content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
i need help with these factor problems
November 30th 2006, 07:41 PM
elfen_lied
i need help with these factor problems
i need help on factoring these the chapter is called "5-11 using several methods of factoring"
2x^4-162
25z^3-36y^2z
can you show how you did it to
November 30th 2006, 07:4... | 4 | [
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Math Help
September 10th 2007, 06:42 PM #1
Newbie
Joined
Sep 2007
Posts
10
trying to make sure i'm doing this right...
solve the recurrence in theta notation
assume base case T(x) = 1 for x <= 5
for T(n) = 4T(n/5) + n , is the answer T(n) = Theta(2n) ?
First of all $T(n) = \Theta (2n)$... | 5 | [
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Motion Projectile, Physics
September 30th 2008, 09:22 PM #1
Motion Projectile, Physics
A tennis ball is struck @ the baseline of the court, 12m from the net. The ball is given an initial velocity with a horizontal component of 24 m/s an initial elevation of 1m
A) What vertical component of initial velocity m... | 4 | [
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... | 7,302 | 7302 | |
Find Hypotenuse when given two angles and side
September 29th 2012, 12:32 PM
DreadfulGlory
Find Hypotenuse when given two angles and side
Hello. I was hoping someone would be able to help with this problem I have.
I have a right triangle. I need to find the hypotenuse x.
I am given the opposite side of... | 4 | [
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really simple multiplication prob
June 24th 2010, 08:24 AM #1
Newbie
Joined
Jun 2010
Posts
10
really simple multiplication prob
got some variables in an example that are being combined, as follows:
2x * x^2 + 4 - x^2 * 2x = 8x
does this really equal 8x?
(2x*x^2) + 4 -(x^2*2x)
both lef... | 5 | [
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story problem involving vectors
January 11th 2012, 03:16 PM
icelated
story problem involving vectors
A plane is flying in the direction 290 degrees ( measured clockwise from north). Its airspeed is 800 km/ hr. The wind at the planes altitude is blowing in the direction 150 degrees ( measured
clockwise from n... | 5 | [
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Abelian Group , proving etc.
November 23rd 2013, 09:33 AM
Cyganek
Abelian Group , proving etc.
ℤ/3ℤ
Show that for all classes:
_ _
x,y ∈ ℤ/3ℤ
The following is true:
_ _ ______ ______
∀x1, x2 ∈ x, y1,y2 ∈ y : x1 + y1 = x2 + y2
I dont now how to make lines directly above the letters ... | 4 | [
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Limits of Functions?
October 2nd 2009, 06:11 PM
dark-ryder341
Limits of Functions?
Hello everyone,
Well, our class recently started learning limits, and I'm having some troubles with two of the questions from the homework.
The first question is:
State the value of the limit of the function: f(x) =... | 5 | [
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Trevisan’s L^1-style Cheeger inequality
My expander class at ETH continues, and for the moment the course notes are kept updated (and in fact I have some more in the notes than I did in class).
Last week, I presented the inequalities relating the definition of expanders based on the expansion ratio with the “spectral”... | 4 | [
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Math Forum Discussions
Re: Proof that mixed partials commute.
Posted: Nov 21, 2013 2:25 AM
Am 19.11.2013 00:45, schrieb Hetware:
> In _Calculus and Analytic Geometry_ 2nd ed.(1953), Thomas provides:
>
> Theorem. If the function w=f(x,y) together with the partial derivatives
> f_x, f_y, f_xy and f_yx are continuous, th... | 4 | [
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normal density with |z|: MGF and CGF
January 25th 2011, 09:15 PM
Volga
normal density with |z|: MGF and CGF
This is sample question to which the study guide does not provide an answer. I'd appreciate if you could check and make comments on my mistakes/narratives.
Question.
Let Z be a random variable wi... | 5 | [
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Acceleration via smoothing
up vote 5 down vote favorite
3
Is the following approach to accelerating the rate of convergence of $(1+1/2+\dots+1/n)- \ln n$ (with $n=1,2,3,\dots$), and other sequences like it, in the literature?
Let $f(t)=(\sum_{1 \leq n \leq t} 1/n) - \ln t$ for $t \geq 0$, so that $f(t)$ tends to Eule... | 4 | [
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Deriving a relation in a group based on a presentation
up vote 12 down vote favorite
2
Suppose I have the group presentation $G=\langle x,y\ |\ x^3=y^5=(yx)^2\rangle$. Now, $G$ is isomorphic to $SL(2,5)$ (see my proof here). This means the relation $x^6=1$ should hold in $G$. I was
wondering if anyone knows how to der... | 5 | [
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Stretching and Shearing away from Coordinate Axes
Date: 08/27/2012 at 16:40:11
From: Costa
Subject: Linear Transformations - Stretching and Shearing
Hi!
After an introduction to 2x2 matrices, the chapter I am studying goes on
to transformations. I am having great difficulty with these four
questions -- in particular... | 5 | [
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... | 7,313 | 7313 | |
Exploring dimensions of process quality measured by the Early Childhood Environment Rating Scale: Differential item functioning analysis
The Early Childhood Environment Rating Scale (Revised; ECERS-R) was designed to measure process quality in child care centers, but the data set that I have been analyzing contains rat... | 4 | [
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[SOLVED] Quadratic Trigonometric Equations
November 14th 2009, 09:05 PM #1
Newbie
Joined
Nov 2009
Posts
2
[SOLVED] Quadratic Trigonometric Equations
Hi there, I'm new.
Anyway, this has got me really stumped. The book is no help; all the examples are much less complicated. I'll just post two examples... | 4 | [
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Euclidean Algorithm
September 29th 2010, 04:16 PM
fenderic
Euclidean Algorithm
Hey, I am having some trouble with an exercise.
"Illustrate how the Euclidean Algorithm allows you to solve for intergers x, y such that 137x + 1000y = 1. You must show all the steps to demonstrate the use of the Euclidean Algorit... | 4 | [
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A Particular Summation Serie
July 24th 2012, 04:50 PM #1
Junior Member
Joined
Jul 2012
From
Morocco
Posts
25
A Particular Summation Serie
Hello All,
I am just wondering if this following has a formula:
[i = 0]∑^k - 1 X^i/Y^i = ?
For example, X = 3, and Y = 2, and k = 5
3^0/2^0 + 3... | 4 | [
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An initial rendering of the Mandelbrot set using canvas
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.
An initial rendering of the Mandelbrot set using canvas
Building on information presented in A brief... | 5 | [
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Math Help
$\frac{1+sec2\alpha}{tan2\alpha} = \frac{1 + \frac{1}{cos(2\alpha)}}{\frac{sin(2\alpha)}{cos(2\ alpha)}} = \frac{cos(2\alpha)+1}{cos(2\alpha)} \cdot \frac{cos(2\alpha)}{sin(2\alpha)}<br /> =$ $= \
frac{cos(2\alpha)+1}{sin(2\alpha)} = \frac{cos^2(\alpha) - sin^2(\alpha) + cos^2(\alpha)+sin^2(\alpha)}{2sin(\al... | 4 | [
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Problems with integration word problems
April 25th 2010, 04:31 PM
bobsanchez
Problems with integration word problems
I was absent the day that we covered these, and have yet to have received a sufficient explanation of how to do them. I understand integration fairly well, but I'm unsure of how to exactly apply
... | 5 | [
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Interest compounded daily
Kelly,
The amount, A(t), that $P becomes after t years at an interest rate of r% compounded m times per year is
A(t) = P(1+r/m)^mt.
In your example A(1) = 100000(1+.005/365)^365 = $100501.25. This is a ridiculously low rate of interest and I suspect that who ever is offering you this is... | 5 | [
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Urgent Question: Convergens of series
December 13th 2006, 01:57 PM #1
Newbie
Joined
Nov 2006
Posts
9
Urgent Question: Convergens of series
Could somebody here please verify my proof?
Given the two sequences $\sum_{n=1}^{\infty} c_{n}$ and $\sum_{n=1}^{\infty} d_{n}$ which is defined as
$d_{n} ... | 5 | [
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limit of a sequence -> possibly squeeze theorem
August 21st 2012, 06:54 AM
Angela11
limit of a sequence -> possibly squeeze theorem
http://img96.imageshack.us/img96/8606/qqqqbj.jpg
so what i'm thinking is that you let
x_n+3 + x_n+2<=x_n+2 + x_n+1 <= x_2 + x_1
then show that the first term can e... | 5 | [
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Archimedean Algorithm for Approximating Square Roots
October 5th 2010, 10:43 PM #1
Member
Joined
Mar 2010
Posts
144
Archimedean Algorithm for Approximating Square Roots
An algorithm for approximating the sqrt (square root) of A is the following: To approximate sqrt A, begin with the initial approximation... | 4 | [
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... | 7,324 | 7324 | |
Another proof using Ordered Field Axioms
April 7th 2007, 03:53 PM #1
Member
Joined
Jan 2007
Posts
114
Another proof using Ordered Field Axioms
Let a, b element R. Show that if a <= b1 for every b1> b, then a <= b.
I think the triangle inequality may be helpful in this but i'm not sure. I really don'... | 4 | [
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... | 7,325 | 7325 | |
Absolute Values
December 9th 2008, 09:38 AM
Zinefer
Absolute Values
I am curious how to proceed with this problem:
$|(5/7)x+(1/4)|<3/4$
I know I must remove the Absolute value, but how?
Thanks in advance.
December 9th 2008, 09:49 AM
masters
Quote:
Hello Zinefer,
$\left \vert \fra... | 4 | [
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Contour lines
April 30th 2013, 05:38 AM #1
Newbie
Joined
Mar 2013
From
Greece
Posts
2
Contour lines
Hey guys!!!Could you help me at this exercise???
Draw some contour lines in the (x, y)–plane of the function h(x,y)=(a*(x+y))/(x^2+y^2+a^2).
Thanks in advance!!!
Re: Contour lines
tzina, ... | 4 | [
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Proof of Generalized Little Theorem of Fermat
Every linear recurrence (with integer coefficients) is effectively a pseudo-primality test. This is simply a slight generalization of Fermat's Little Theorem, n^p = n (mod p). Consider the general
linear recurrence of order d
... | 4 | [
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More on dynamics of "infinitely many agents"
In my last post I treated a model for opinion dynamics. The specific feature of this model by Canuto, Fagnani and Tilli was that it is not based on a finite number of agents, each moving around in
opinion space, but on the density of agents on the opinion space. On the one h... | 4 | [
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0.... | 7,329 | 7329 | |
Math Forum: Ask Dr. Math FAQ: Pythagorean Triples
What is a Pythagorean triple? What do Pythagorean triples have to do with Fermat's Last Theorem?
A Pythagorean triple is a set of three positive whole numbers a, b, and c that are the lengths of the sides of a right triangle. This means that a, b, and c satisfy the equ... | 4 | [
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0.02856445... | 7,330 | 7330 | |
complex numbers
January 15th 2009, 07:07 AM #1
Junior Member
Joined
Oct 2008
Posts
39
complex numbers
if z = x+yi prove that:
abs(e^z)=e^x
so I can show that e^z = e^x * cisy, I'm not sure what how the absolute value will change this.
Two big hints.
$\left| {cis(t)} \right| = \left|... | 4 | [
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-0.... | 7,331 | 7331 | |
What is a reasonable finitary analogue of the statement that harmonic functions are smooth?
up vote 14 down vote favorite
5
In my answer to this question on MU, I suggested that the OP think about the difference between real-differentiable and complex-differentiable functions by using a sort of finitary analogue. One ... | 4 | [
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Justifying the Method of Undetermined Coefficients
May 5th 2007, 05:21 PM #1
Justifying the Method of Undetermined Coefficients
I'm trying to "Justify the Method of Undetermined Coefficients" by using the "Annihilator Method."
To start, I am given a linear, constant coefficient, nonhomogeneous differential eq... | 4 | [
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0.005065917... | 7,333 | 7333 | |
Laser reflecting off a mirror to a point on a plane
November 17th 2009, 08:33 AM
azuralshadow
Laser reflecting off a mirror to a point on a plane
The problem is;
Tim is pointing a lazer beam from the point A in the direction u towards a mirror whose shape is given by G(x,y,z)=0. After reflecting from the mir... | 5 | [
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... | 7,334 | 7334 | |
Calculus of Piecewise Functions
Date: 06/07/2003 at 21:09:28
From: Matt
Subject: Calculus of the modulus function
The modulus function (absolute value function) is a piecewise function
that is customarily written as f(x)=|x|. Functions such as the floor
and ceiling functions are also piecewise, but they are written
c... | 5 | [
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0.08740234375,
-0.002639770507... | 7,335 | 7335 | |
linear approximation of mapping
June 27th 2014, 08:17 PM #1
Senior Member
Joined
Sep 2013
From
Portland
Posts
423
Thanks
53
linear approximation of mapping
question says to find the linear approximation of the given mapping at the indicated point
$f(x,y) = (xe^y + cos(y), x, x+e^y); (1,0)$
... | 5 | [
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-0.067... | 7,336 | 7336 | |
2 More Difficult Questions, Any Help Is Appreciated
April 11th 2008, 03:38 AM
ChiragDesai01
2 More Difficult Questions, Any Help Is Appreciated
the first question is:
let a1, a2, a3, a4, a5 , be any distinct positive integers. Show that there exists at least one subset of three of these integers whose sum i... | 5 | [
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-0.... | 7,337 | 7337 | |
A simple geo problem
September 28th 2009, 04:56 PM #1
Newbie
Joined
Sep 2009
Posts
1
A simple geo problem
Hey, I've never been good at math so would you mind explaining to me a few problems? =]
1.The measure of the supplement of an angle is 60 less than 3 times the measure of the complement of the an... | 4 | [
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Wendy's hamburgers! help urgent
February 28th 2008, 03:09 PM #1
heres the problem my math teacher gave out. its due 2morrow. 2/29/08
CHEESE, MAYO, KETCHUP, MUSTARD, PICKLES, ONIONS, TOMATOES, LETTUCE. How many ways can you order a hamburger at Wendy's.
8th grade math. I know its easy but how can you d... | 4 | [
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nonhomogeneous linear system
Can you help me with this system of linear equations, to find the general solution?? dx1/dt=2x1-5x2 dx2/dt=x1-2x2+cos(t)
\displaystyle \begin{align*} \frac{dx_1}{dt} &= 2x_1 - 5x_2 \\ \frac{dx_2}{dt} &= x_1 - 2x_2 + \cos{(t)} \end{align*} Differentiating the second equation, we get \displa... | 4 | [
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0... | 7,340 | 7340 | |
Scanning for Mountains
Date: 06/02/99 at 03:09:10
From: Leanne Kwok
Subject: Geometry
Dr. Math,
Hi can you help me with this math question?
I am standing on a hill 600 metres high and scanning the horizon to
see a mountain 200 km away. High-Tech optical equipment is available.
How high must the mountain be for thi... | 4 | [
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Probability an Average is Below 25 if 3 Samples are Taken from a Normal Distribution
January 23rd 2011, 01:30 PM #1
Junior Member
Joined
Jun 2009
Posts
68
Probability an Average is Below 25 if 3 Samples are Taken from a Normal Distribution
Three independent samples are taken from the normal random variab... | 4 | [
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Need help. Test on Monday!
October 4th 2008, 04:53 PM
Chinnie15
Need help. Test on Monday!
Hello everyone.
I am in desperate need of help. I am in college algebra and just can NOT get modeling down, and I have a test on Monday! I am completely lost, and realize I should have gotten help before now but
n... | 4 | [
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... | 7,343 | 7343 | |
What does 3^n count?
February 6th 2011, 03:44 PM
MSUMathStdnt
What does 3^n count?
I am asked to prove, combinatorially:
$2 \cdot 3^0+2 \cdot 3^1+2 \cdot 3^2+\ldots+ 2 \cdot 3^{n-1}=3^n-1$
Are they kidding about this? It took me less than half a minute to prove it by factoring out the 2 and using the g... | 4 | [
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... | 7,344 | 7344 | |
Negative Squared, or Squared Negative?
Date: 10/18/2002 at 22:57:56
From: Tom
Subject: Negative Numbers Squared.
After reading your answer in
Exponents and Negative numbers
http://mathforum.org/library/drmath/view/55709.html
it seems to me that you're ignoring an important fact: -3 isn't just
-1*3, but a num... | 4 | [
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More differentiation help
August 26th 2009, 05:57 AM
arze
More differentiation help
Find in a simplified form, the derivative of the function
$\frac{2+\ln (1+x)^2}{2-\ln (1-x)^2}$
Used the quotient rule:
$\frac{(2-2\ln (1-x))(\frac{2(1)}{(1+x)})-(2+2\ln (1+x))(\frac{-2(-1)}{(1-x)})}{(2-2\ln (1-x))^2... | 5 | [
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-0.0576171875,
-0.0458984375... | 7,346 | 7346 | |
Math Images
Limit
From Math Images
A limit is the behavior of a function as its inputs approach arbitrarily close to a given value.
Limits are written in the following form:
$\lim_{x \to a}f(x) = L$
The expression above states that when $x\,$ approaches arbitrarily close to $a\,$, the function $f(x)\,$ becomes ar... | 4 | [
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... | 7,347 | 7347 | |
Differential Analysis
June 8th 2010, 01:43 PM #1
Newbie
Joined
Jun 2010
Posts
5
Differential Analysis
For some reason, I'm not getting this....
The volume of an object is given by $V=[pi(4.5(t)+1)^2(t)]$ If t changes from 4 to 5:
Find dV and delta(V)
Heres how I am solving it:
Vprime=... | 5 | [
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0.0244140625,
-0.1118164062... | 7,348 | 7348 | |
gcd of a,a+b
May 15th 2012, 12:30 PM
Ant
gcd of a,a+b
Hi,
I'm completely stumped on how to approach this question. As I can't see a way of knowing the prime factorization of a+b...
Prove that:
$gcd(a, a + b) = gcd(a + b, b)$
Thanks for any help!
May 15th 2012, 01:08 PM
Deveno
Re: gcd of a,a... | 5 | [
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... | 7,349 | 7349 | |
Sticks and Stones
Students will play Sticks and Stones, a game based on the Apache game "Throw Sticks," which was played at multi-nation celebrations. Students will collect data, investigate the likelihood of various
moves, and use basic ideas of expected value to determine the average number of turns needed to win a ... | 4 | [
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... | 7,350 | 7350 | |
Other ways of writing Green's theorem
In the introductory page on Green's theorem, we wrote Green's theorem as \begin{align*} \dlint = \iint_\dlr (\curl \dlvf) \cdot \vc{k} \, dA \end{align*} or \begin{align*} \dlint = \iint_\dlr \left(
\pdiff{\dlvfc_2}{x} - \pdiff{\dlvfc_1}{y}\right)dA, \end{align*} where $\dlvf(x,y) ... | 4 | [
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0.0329589843... | 7,351 | 7351 | |
Determining x-intercepts of polynomial function
March 8th 2011, 11:08 AM #1
Junior Member
Joined
Feb 2011
Posts
58
Determining x-intercepts of polynomial function
How do you determine the x-intercepts of the polynomial function y = -(2x+5)^3 - 20
I did this:
0 = -(2x+5)^3 - 20
20 = -2x+5)^... | 4 | [
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-0.057373046875,
-0.029... | 7,352 | 7352 | |
Hi, quick distance between points ?
August 12th 2008, 06:11 PM
Dillon658
Hi, quick distance between points ?
Hello everyone! I can't believe I actually found a forum for math! Mathletes unite, Well it's my last class to finish up my degree and I can't believe I waited till last minute to take it! now
its bea... | 4 | [
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... | 7,353 | 7353 | |
[SOLVED] Binary Operations
May 10th 2010, 01:47 PM #1
MHF Contributor
Joined
Mar 2010
From
Florida
Posts
3,093
Thanks
5
[SOLVED] Binary Operations
Suppose that two binary operations, denoted by $\oplus$ and $\odot$, are defined on a nonempty set S, and that the following conditions are satisfied ... | 5 | [
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0.04931640625,
-0.0289306640625,
... | 7,354 | 7354 | |
finding derivative
October 9th 2007, 01:59 PM
rmn
finding derivative
y= ((2x-5)^-1 ) * (x^(2)-5x)^6
this is what i have so far
dy/dx=
(2x-5)^-1 * 6(x^2-5x)^5 * (2x-5) * 2 +
(x^2-5x)^6 * -1(2x-5)^-2 * 2
cancel the (2x-5) in the first term right
so then i have
12(x^2-5x)^5- 2(x^2... | 4 | [
0.0031280517578125,
-0.0164794921875,
0.0947265625,
0.0225830078125,
0.026611328125,
-0.008544921875,
-0.031005859375,
-0.036376953125,
0.00115203857421875,
0.055908203125,
0.099609375,
0.036376953125,
0.007080078125,
-0.0250244140625,
-0.0001506805419921875,
0.1181640625,
-0.09375,
... | 7,355 | 7355 | |
Homework Help
Posted by Xochil on Wednesday, May 23, 2012 at 9:41pm.
A car is moving at the rate of 60 miles per hour, and the diameter of its wheels is 2.5 feet (1 mile=5280 feet)
a) Find the angular speed of the wheels in radians per minute
b) Find the number of revolutions per minute the wheels are rotating.
•... | 4 | [
-0.05810546875,
0.06884765625,
-0.0220947265625,
0.0255126953125,
0.01153564453125,
0.01263427734375,
-0.076171875,
0.03662109375,
0.01348876953125,
-0.060302734375,
0.091796875,
-0.0034637451171875,
0.0301513671875,
-0.0341796875,
-0.0133056640625,
0.076171875,
-0.1064453125,
0.08... | 7,356 | 7356 | |
Is there a good reason why a^{2b} + b^{2a} <= 1 when a+b=1?
up vote 23 down vote favorite
12
The following problem is not from me, yet I find it a big challenge to give a nice (in contrast to 'heavy computation') proof. The motivation for me to post it lies in its concise content.
If $a$ and $b$ are nonnegative real... | 5 | [
-0.040283203125,
0.048095703125,
0.027099609375,
0.04638671875,
-0.0732421875,
0.00726318359375,
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-0.0201416015625,
0.0216064453125,
0.045166015625,
-0.09619140625,
0.0162353515625,
0.09423828125,
0.0849609375,
0.00946044921875,
0.1064453125,
0.04443359375,
-0.01647... | 7,357 | 7357 | |
Effective Interest Rates
Page 5 of 7 Follow
... | 4 | [
0.00909423828125,
0.042236328125,
0.00701904296875,
0.039794921875,
0.036376953125,
-0.1181640625,
0.028076171875,
0.037353515625,
0.06298828125,
0.06689453125,
0.08642578125,
0.01953125,
-0.052490234375,
0.01190185546875,
0.02880859375,
0.042724609375,
-0.08642578125,
-0.044677734... | 7,358 | 7358 | |
difficulty with quadratic fraction problem
February 16th 2011, 10:55 AM #1
Junior Member
Joined
Oct 2010
Posts
27
difficulty with quadratic fraction problem
Hello all. i'm currently trying to solve this equation:
x-1 / x - 4 / x+3 = 0
my skills with rational equations are very limited, and fin... | 4 | [
-0.048583984375,
-0.0025482177734375,
-0.002471923828125,
-0.052001953125,
-0.036865234375,
0.008544921875,
-0.00128936767578125,
-0.0286865234375,
0.0274658203125,
-0.0361328125,
0.035888671875,
-0.11669921875,
0.052978515625,
0.05029296875,
-0.01385498046875,
0.062255859375,
0.0737... | 7,359 | 7359 | |
Finding the limit of ((x-1)/x)^x as x->infinity
August 10th 2009, 07:21 AM #1
Newbie
Joined
Mar 2009
Posts
20
Dear all,
I am trying to find, analytically, the limit of ((x-1)/x)^x as x->infinity.
I tried l'Hopital's rule but it seems to make it more complicated. I know that the limit is 1/e but n... | 5 | [
0.072265625,
-0.044189453125,
-0.00021648406982421875,
-0.031982421875,
0.0234375,
-0.06494140625,
0.033203125,
0.01312255859375,
-0.036376953125,
0.09375,
0.01031494140625,
-0.03173828125,
0.049560546875,
0.04345703125,
0.01171875,
0.03173828125,
0.0198974609375,
-0.138671875,
-... | 7,360 | 7360 | |
Integral Questions
March 6th 2009, 09:35 AM
colaname
Integral Questions
Can you help me.
integral from 4 to 1
x=( x^2-x+1)/(sqrt(x))
integral from pie to pie/4
x=secxtanx
integral from 4 to x
u=(2+(sqrt(u))^8
integral
x=sqrt(1+x^2x^5)
integral
x=tan^6xsec^4x
March 6... | 5 | [
0.0703125,
0.0189208984375,
0.11962890625,
0.0634765625,
-0.02294921875,
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0.00933837890625,
0.0048828125,
0.01153564453125,
0.041748046875,
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0.0283203125,
-0.0272216796875,
-0.007171630859375,
0.06689453125,
0.01831054... | 7,361 | 7361 | |
how to choose the cable rating for load (KW)? EXAMPLE.50KW load
Question how to choose the cable rating for load (KW)? EXAMPLE.50KW load
Question Submitted By :: Electrical-Engineering
I also faced this Question!! Answer ... | 5 | [
-0.0245361328125,
0.10791015625,
-0.031982421875,
0.036376953125,
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0.12158203125,
0.0150146484375,
-0.03271484... | 7,362 | 7362 | |
Check Recurrence Relation
July 31st 2011, 04:23 PM
lovesmath
Check Recurrence Relation
The formula 1+r+r^2+...+r^n=(r^(n+1)-1)/(r-1) is true for all real numbers r except r=1 and for all integers n>=0. Use this fact to solve the following problem:
If n is an integer and n>=1, find a formula for the expressi... | 4 | [
-0.0712890625,
0.037353515625,
-0.029541015625,
0.0869140625,
0.01019287109375,
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0.0220947265625,
0.020751953125,
-0.01470947265625,
-0.099609375,
-0.068359375,
-0.004852294921875,
0.06591796875,
0.0152587890625,
-0.0284423828125,
-0.0284423828125,
-0.... | 7,363 | 7363 | |
Proc Arima
Contents Index
Analysis of time series data in the time domain is done with this procedure. Box-Jenkins methodology (the fitting of ARIMA models to time series data) and also transfer function (input type) models
can be used. Frequency domain analysis of time series can be done using Proc Spectra.
The fra... | 4 | [
-0.09228515625,
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-0.02783203125,
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0.041015625,
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0.004608154296875,
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-0.08251953125,
-0.04345703125,
-0.07... | 7,364 | 7364 | |
Vector Parametric equation
April 27th 2012, 09:00 PM #1
Newbie
Joined
Apr 2012
From
New Zealand
Posts
6
Vector Parametric equation
Find a vector parametric equation for the plane containing the points whose position vectors are
u = (1,−1, 0), v = (3, 0,−4) and w = (0, 2, 5).
Re: Vector Parametri... | 5 | [
-0.0341796875,
-0.004058837890625,
-0.06201171875,
-0.06396484375,
0.07568359375,
0.041259765625,
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-0.0169677734375,
-0.052490234375,
0.05712890625,
-0.004119873046875,
0.032470703125,
0.039794921875,
0.041015625,
-0.07470703125,
0.044189453125,
-0.0888671875,
-0.0869... | 7,365 | 7365 | |
Mathematical relations.....
August 11th 2006, 02:18 AM
Colette
Mathematical relations.....
Hi folks can anyone answer this for me Plz..
Let R and S be relations on a set X.Show that R x S is a relation on X x X?
August 11th 2006, 07:54 AM
ThePerfectHacker
Quote:
Originally Posted by Colette
... | 4 | [
-0.023681640625,
-0.045654296875,
-0.0029449462890625,
-0.036376953125,
0.0172119140625,
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0.06689453125,
0.0245361328125,
0.0002956390380859375,
-0.0166015625,
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0.044677734375,
0.1337890625,
0.025634765625,
0.0152587890625,
0.0196533203125,
0.05859375,
0... | 7,366 | 7366 | |
Stone-Weierstrass analogue for $L^p$
up vote 6 down vote favorite
3
Let $A$ be a complex algebra of bounded measurable functions on the measure space $(X,\mu)$ (case of $[0,1]$ with Lebesgue measure is enough for me) closed under conjugation. Assume that $A$
separates points, i.e. there is no non-trivial measurable pa... | 5 | [
-0.027587890625,
-0.0517578125,
0.006927490234375,
0.001800537109375,
0.0498046875,
0.0703125,
0.1044921875,
0.006805419921875,
0.00151824951171875,
-0.048095703125,
-0.0240478515625,
0.05419921875,
0.032958984375,
0.01171875,
0.0228271484375,
-0.061767578125,
-0.0301513671875,
0.0... | 7,367 | 7367 | |
Please solve logarithmic equation
November 15th 2007, 05:15 AM #1
Member
Joined
Oct 2007
Posts
134
Please solve logarithmic equation
Please help solve equation:
ln x + ln (x + 2) = 4
ln x (x + 2) = 4
e ^ 4 = x (x + 2)
What do I do next to solve for x?
Thank you.
First of all we... | 4 | [
0.053466796875,
-0.000431060791015625,
0.08447265625,
-0.018798828125,
0.0213623046875,
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-0.00872802734375,
0.043212890625,
-0.00014209747314453125,
-0.0225830078125,
0.12353515625,
-0.06884765625,
-0.0034332275390625,
0.04541015625,
-0.04150390625,
0.0118408203125,
... | 7,368 | 7368 | |
Describing Distributions
Back to the Table of Contents
Applied Statistics - Lesson 3
Describing Distributions
Lesson Overview:
Three types of in... | 4 | [
0.07080078125,
-0.0625,
0.0498046875,
-0.040283203125,
-0.040283203125,
-0.035400390625,
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0.1279296875,
0.0086669921875,
0.07275390625,
0.07958984375,
-0.00139617919921875,
0.05859375,
0.005096435546875,
-0.039794921875,
-0.06201171875,
0.0206298828125,
-0.037109375... | 7,369 | 7369 | |
Code: 2D line intersection
Code for 2D line intersection
I’ve been struggling with finding the intersection between two lines so that the resulting point actually lies on the specified line segments. Most line intersection formulas use an infinite line
model, so the point will tend to lie on an infinite extension of t... | 4 | [
-0.134765625,
0.00830078125,
-0.031982421875,
-0.09423828125,
0.00634765625,
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0.072265625,
-0.0108642578125,
-0.00286865234375,
0.030029296875,
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-0.038818359375,
-0.0263671875,
-0.08154296875,
0.01239013671875,
-0.1337890625,
-0.00964... | 7,370 | 7370 | |
Arithmetic series..... other problems..
May 19th 2010, 05:15 AM
ansonbound
Arithmetic series..... other problems..
An arithmetic series has first term a and common difference d.
The sum of the first 31 terms of the series is 310.
a) Show that a + 15d = 10
> S31 = 31/2 ( 2a + (31-1) d)
> 31( a +... | 4 | [
-0.11376953125,
0.021728515625,
0.07275390625,
-0.09912109375,
-0.04052734375,
0.060546875,
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-0.00604248046875,
-0.0169677734375,
0.0810546875,
0.0247802734375,
-0.083984375,
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-0.027099609375,
-0.033447265625,
-0.017333984375,
0.044189453125,
0.00... | 7,371 | 7371 | |
Calculus Notes
February 4th 2008, 04:43 AM #39
February 2nd 2008, 03:03 PM #38
February 2nd 2008, 12:12 AM #37
February 1st 2008, 11:02 PM #36
February 1st 2008, 12:17 PM #35
February 1st 2008, 11:24 AM #34
February 1st 2008, 08:30 AM #33
February 1st 2008, 07:26 AM #32
Global Moderator
February 1st 2008, 05:41 AM #3... | 5 | [
-0.08935546875,
-0.006500244140625,
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-0.0164794921875,
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0.0693359375,
0.03564453125,
-0.039794921875,
-0.05712890625,
-0... | 7,372 | 7372 | |
5.1 Integral Form of the Equations
[Next Section] [Previous Section] [Table of Contents]
Full Equations (FEQ) Model for the Solution of the Full, Dynamic Equations of Motion for One-Dimensional Unsteady Flow in Open Channels and Through Control Structures
U.S. GEOLOGICAL SURVEY WATER-RESOURCES INVESTIGATIONS REPORT ... | 4 | [
0.009521484375,
0.037353515625,
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0.01220703125,
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0.0859375,
0.0076904296875,
-0.02099609375,
-0.06201171875,
-0.0125732421875,
0.076171875,
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-0.050537109375,
0.05224609375,
-0.1142578125,
0.021240234375,
-0.0... | 7,373 | 7373 | |
Bayes Estimator
November 28th 2009, 12:13 PM #1
Junior Member
Joined
Nov 2009
Posts
34
Bayes Estimator
The breaking strength of a type of cloth is to be measured for 20 specimen. The underlying distribution is normal with unknown mean $\theta$ but with a standard deviation of 3. Suppose that the
unkn... | 5 | [
-0.0283203125,
-0.00170135498046875,
0.0703125,
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0.009033203125,
0.00390625,
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-0.0184326171875,
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-0.01336669921875,
-0.031494140625,
0.07275390625,
0.01190185546875,
0.001579284... | 7,374 | 7374 | |
Defining Quadratic Formula
Date: 01/21/2002 at 14:31:51
From: Monica Kerai
Subject: Defining quadratic formula
Here's what I understand so far:
a+b+c: 5 8 12 17 23 ...
3a+b: 3 4 5 6 ...
2b: 1 1 1 ...
You figure out what a, b, and c are, and then you put them into thi... | 4 | [
-0.125,
0.068359375,
0.0390625,
0.038330078125,
-0.0625,
0.1279296875,
-0.02001953125,
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0.041748046875,
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-0.022216796875,
0.080078125,
-0.06884765625,
-0.014892578125,
0.02233... | 7,375 | 7375 | |
Find Vertical and Horizontal Asymtot
April 1st 2007, 11:35 PM #1
Junior Member
Joined
Nov 2006
Posts
59
Find Vertical and Horizontal Asymtot
a. Find Vert and Hori asymtot
b. Interval of increase and decrease
c. Local Max and Min
d. Concavity and Inflection point.
f(x)= x Tan[x], -Pi/2 < ... | 5 | [
-0.01092529296875,
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0.01141357421875,
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0.0081787109375,
0.0771484375,
-0.0225830078125,
0.058349609375,
-0.1005859... | 7,376 | 7376 | |
Simple collision response
Member
Posts: 45
Joined: 2006.11
I had a difficult time finding a simple, elegant solution to a seemingly simple problem.
What I had:
The position of a projectile, it's size, and it's velocity
The intersection point with the terrain it collided with
The normal at the intersection point ... | 4 | [
0.025634765625,
0.04638671875,
0.057373046875,
0.01611328125,
0.056884765625,
-0.030517578125,
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0.056884765625,
-0.0181884765625,
0.038330078125,
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-0.006134033203125,
-0.05029296875,
0.0830078125,
-0.04833984375,
0.080078125,
0.0205078125,
0.06933593... | 7,377 | 7377 | |
Perfect Numbers
Date: 10/17/96 at 20:18:58
From: Anonymous
Subject: Perfect numbers
Is there any way, other than by trial and error, to figure out what
the perfect numbers are?
Date: 11/05/96
From: Doctor Yiu
Subject: Re: Perfect numbers
Dear Tahquitz,
A perfect number is a positive integer that is equal to the ... | 4 | [
-0.031494140625,
0.048828125,
0.034912109375,
0.035888671875,
0.046630859375,
-0.0181884765625,
0.0137939453125,
0.0859375,
-0.03955078125,
0.033203125,
-0.060302734375,
0.037353515625,
0.08154296875,
-0.03662109375,
-0.036865234375,
-0.087890625,
-0.07373046875,
0.017578125,
0.0... | 7,378 | 7378 | |
Zero and Negative Gromov-Witten invariants in genus 0
up vote 2 down vote favorite
3
I'm working on a project and I've used the Picard-Fuchs equation at a maximally unipotent monodromy point for a certain 1-dimensional family of Calabi-Yau 3-folds to calculate the A-model Yukawa
coupling, and thus the generating funct... | 5 | [
-0.1337890625,
-0.037353515625,
-0.001617431640625,
-0.00433349609375,
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0.01019287109375,
-0.005859375,
0.0230712890625,
-0.06298828125,
0.1640625,
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-0.0888671875,
0.07861328125,
0.0026092529296875,
0.037353515625,
-0.03662109375,
-0... | 7,379 | 7379 | |
inverse hyperbolic derivative
October 26th 2009, 07:19 PM #1
Member
Joined
Dec 2007
Posts
137
So in this question I defined $g(x) = \frac{1}{\sqrt{x^2-6x}}$ and $h(x) = arccoshx$.
The function I am then evaluating is $f(x) = h(g(x))$. It is also given that $\frac{dy}{dx}arccoshx = ln(x+\sqrt{x^2-1}), ... | 4 | [
0.035400390625,
-0.0439453125,
0.07568359375,
-0.021240234375,
-0.037353515625,
-0.07666015625,
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0.040771484375,
0.0087890625,
-0.007781982421875,
0.06298828125,
0.040283203125,
0.04833984375,
-0.08154296875,
-0.06005859375,
0.01214599609375,
0.00653076171875,
-0.1074... | 7,380 | 7380 | |
First Order PDE Solution Method Issues
up vote 2 down vote favorite
Greetings, I have a rather pedantic problem that's honestly been holding me back for over a month & is something neither stackoverflow nor some of my professors nor some graduate students have been
able to help me with so I apologize if this question ... | 4 | [
-0.10986328125,
-0.034423828125,
0.0791015625,
-0.03076171875,
-0.0517578125,
0.04345703125,
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0.0400390625,
-0.049560546875,
0.05224609375,
0.040771484375,
0.0693359375,
0.00262451171875,
-0.056884765625,
-0.0203857421875,
-0.01031494140625,
-0.015625,
-0.0317382812... | 7,381 | 7381 | |
Posts from July 2012 on LARS P. SYLL
31 July, 2012 at 14:39 | Posted in
Statistics & Econometrics
|
Leave a comment
In many statistical and econometric studies R^2 is used to measure goodness of fit – or more technically, the fraction of variance ”explained” by a regression.
But it’s actually a rather weird measur... | 4 | [
0.126953125,
0.0281982421875,
0.00390625,
0.09326171875,
0.004180908203125,
0.007476806640625,
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0.0341796875,
0.064453125,
0.025634765625,
0.021240234375,
0.02880859375,
0.0026397705078125,
0.08447265625,
0.01495361328125,
-0.019287109375,
0.015869140625,
-0.04003906... | 7,382 | 7382 | |
An Introduction to Categorical Data Analysis
More About This Textbook
Overview
Praise for the First Edition
"This is a superb text from which to teach categorical data analysis, at a variety of levels. . . [t]his book can be very highly recommended."
—Short Book Reviews
"Of great interest to potential readers is th... | 5 | [
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0.0179443359375,
-0.... | 7,383 | 7383 | |
Exponentiable objects in a category, valued in a larger, containing category
up vote 7 down vote favorite
1
Recall that when dealing with topological spaces one usually likes dealing with a subcategory of $Top$ which is convenient, one facet of which is that it is cartesian closed. However to get to a
similar point wi... | 4 | [
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0.07958984375,
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0.000249862670... | 7,384 | 7384 | |
Homework Help
Posted by James on Saturday, July 28, 2012 at 11:42am.
Three masses that are 10 kg each are located at the corners of an equilateral triangle, with side length of 0.55m. What is the magnitude of the total force acting on one mass due to the other two
masses?
The answer is supposed to be 3.82e-08 N. Any ... | 4 | [
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-... | 7,385 | 7385 | |
How Many are in the Group?
Date: 10/17/96 at 14:58:25
From: Paul Benedict
Subject: How Many in Group?
Mr. Jackson polled the class to see how many students had been to one
or both of the nearby state parks. He found that everyone in Katie's
group had been to at least one of the parks. When he asked how many
had bee... | 4 | [
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-0.0050048828125,... | 7,386 | 7386 | |
How do I simplify these things?!
February 11th 2009, 01:15 PM #1
Junior Member
Joined
Aug 2008
Posts
35
How do I simplify these things?!
Big numbers like the 2 are to the power of:
1. tan x * cos x
2.csc x *cos x * tan x
3. (1 - sin x) (1 + sin x)
4. sin x + cos x * tan x
5. cos2x-... | 4 | [
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Using Pascal's Triangle to Solve a sqrt Binomial
May 22nd 2010, 01:47 PM
aMUSEment
Using Pascal's Triangle to Solve a sqrt Binomial
I need an answer to these expressions using the Pascal method... I was doing very well on my work until I ran into these two questions:
$<br /> (\sqrt{a}+\sqrt{b})^6<br />$
... | 4 | [
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0.0252685546875,
-0.02978515625,
0.0595703125,
0.10107421875,
-0.027099609375,
-0.00140380... | 7,388 | 7388 | |
Homework Help
Posted by vera on Saturday, April 21, 2012 at 5:13pm.
A newspaper article stated that college students at a local university spent an average of $95 on beer a year. A student investigator who believed the average stated was too high polled a random
sample of 50 students and found a mean of $92.25 and s =... | 4 | [
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-0.00830... | 7,389 | 7389 | |
need help plz infinite limit
December 8th 2006, 04:38 AM
gracy
need help plz infinite limit
Let f(x)= x e^(-x)
(a) determine the domain of the function f(x)
(b)Is f(x) an odd or even orneither
(c)determine any discontunity point for f(x)
(d)evaluate lim (x->infinity) f(x) and lim (x->-infinity) f... | 5 | [
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0.046630859375,
-0.0791015625,
-0.02392578125,
-0.1142578125,
-0... | 7,390 | 7390 | |
Math Forum Discussions - Re: Archimedes square root of 3
Date: Jan 24, 2013 10:17 AM
Author: Milo Gardner
Subject: Re: Archimedes square root of 3
Archimedes estimated pi by
22/7 > pi > 223/71
1. the method scaled 22/7 by 10/10 = 220/70
2.obtained the lower limit by 22/7 10/10 = 220/70
220/71 and added 223/71
a... | 4 | [
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-0.043457031... | 7,391 | 7391 | |
Law of Sines Word Problem - Ambiguous Case
December 5th 2009, 02:51 PM
maryanna91
Law of Sines Word Problem - Ambiguous Case
Here's the word problem:
A ship is headed due north at a constant 24 miles per hour. Because of the ocean current, the true course of the ship is 15°. If the currents are a constant 2... | 4 | [
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0.0625,
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-0.026000... | 7,392 | 7392 | |
Stuck on a congruency problem
March 9th 2009, 07:55 PM #1
Newbie
Joined
Mar 2009
Posts
5
Stuck on a congruency problem
I'm using Wilson's Theorem to find the remainder of 24! when divided by 29. Here are my steps thus far:
24!*25*26*27*28 ≡ -1 mod 29
24!*(-4)*(-3)*(-2)*(-1) ≡ -1 mod 29
24!... | 4 | [
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Flux linkage in a radially thick coil
]>
Flux linkage in a radially thick coil
! This page displays correctly only in MathML capable browsers.
flux linkage in a plain, circular loop of wire immersed in a homogenous magnetic field (figure RTZ) you take as the area a value of π times the square of the loop radius, r -... | 5 | [
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Markov Chain of random variables from a primitive markov chain
October 19th 2011, 08:12 AM
puggles
Markov Chain of random variables from a primitive markov chain
I'm a little unsure if my approach here is correct, which is making it difficult to find the limit. Any and all help will be appreciated!
Let ${X_... | 4 | [
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-0.... | 7,395 | 7395 | |
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Topic: name for definition in group theory
Replies: 15 La... | 4 | [
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-0.0196533203125,
... | 7,396 | 7396 | |
I need some help understanding some concepts (long post)
July 1st 2008, 02:26 PM
jschlarb
I need some help understanding some concepts (long post)
Okay, my professor hasn't been very reliable and my midterm is on thursday so this is the only place where I can get help.
The first concept is solving variable ... | 5 | [
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Extremal properties of the determinant for matrices with entries in a fixed subset of $[-1,1]^{n^2}$?
up vote 9 down vote favorite
4
Given a multiset $S\subset [-1,1]^{n^2}$, we set $$m(S)=\min\vert \det(M)\vert$$ where the minimum is over all matrices with entries forming the multiset $S$ and $$a(n)=\max m(S)$$ wher... | 5 | [
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0.1533203125,
-0.03735... | 7,398 | 7398 | |
How to calculate the equivariant cohomology ring of $P^2$?
up vote 2 down vote favorite
It is well known that Kirwan's injection theorem gives an ring injection from $H^{\ast}_T(M)$ to $H^{\ast}_T(M^T)$ which is induced by the inclusion $M^T \to M$, where $T$ is a torus acting on
manifold $M$ and $M^T$ is the fixed po... | 4 | [
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