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Common math questions, quality answers.
Jul24-14 10:02 AM Greg Bernhardt 
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Test your skills. Math challenges will be posted at least once a week. Suggestions for problems are welcomed.
Aug5-14 02:05 PM fredoniahead 
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All math courses. PDFs, tutorials and web links.
Aug13-14 05:16 PM seouldavid 
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Jan16-12 Greg Bernhardt
Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:23 AM
1 38,941
So heres how it goes. Find the coordinates of the centre and the radius of the circle x^2 + y^2 - 4x + 6y -12 =0 ...
Aug1-09 11:39 AM
5 806
Can somebody demonstrate : \{{n!}}}} < \left( {1 + \frac{1}{n}} \right)^n \] ITS not A HOMEWORK
Aug1-09 09:40 AM
13 1,197
Hello, I came across a text saying that if \int^{\infty}_{-\infty}P(x)=1 then...
Aug1-09 05:51 AM
1 639
Hello everyone. I have been doing some searching, but I haven't come across any good articles on Benford's law in...
Aug1-09 05:29 AM
0 735
Hi, I am a college freshman and have taken Calculus I,II,III (covering derivatives, integrals, series and vectors)...
Jul30-09 10:37 PM
2 898
I got this from physics' double slit experiment. The way it is done on the physics book is by approximation. Since i...
Jul30-09 03:02 PM
1 765
Would a perfectly circular set of point charges appear to be one point charge if you could see the electric field?...
Jul30-09 12:49 PM
3 1,193
Hi, I was thinking back at the days when I took calculus and how we had to prove things like the product rule etc. ...
Jul30-09 05:32 AM
6 1,416
Hi all Can anyone give me some websites which are on problem solving. When i mean problem solving, i mean logical...
Jul30-09 05:28 AM
1 1,131
Hi every body I am trying to intergrate the following function using Maple: ...
Jul29-09 07:51 PM
1 875
Hey all. I'm actually a math and chemistry major at the Univ. of Illinois Chicago. I have a competitive GPA,...
Jul29-09 12:49 PM
4 6,209
Hey, I was wondering. Since the Fourier Series coefficients can just be represented in the form of a Fourier...
Jul28-09 09:49 PM
9 6,566
Hello, What I really want to do is deal with spherical "crescents" and incomplete annuli and see how well they are...
Jul28-09 06:37 PM
1 2,815
If A is a group and B is a subgroup of A, what is A/B? I don't need a definition really, just the term or name for...
Jul28-09 07:54 AM
2 1,021
In an experiment I am performing, I observed the following: Result is directly proportional to A Result is...
Jul27-09 11:19 PM
4 980
I have a function I want to model. It is periodic, but the period keeps decreasing. Basically, it'll be a periodic...
Jul27-09 08:33 PM
0 521
Hello all, Is there any way to make the Gamma function \Gamma defined at z=0? Because in my calculations, I have a...
Jul27-09 04:51 PM
18 2,247
Hi! I'd like to ask the following question. Does it make sense to take unions and intersections over an empty set?...
Jul27-09 01:38 PM
4 2,436
Jul27-09 01:27 PM
6 1,047
Hi whats up, Can someone tell me what it means to create 3 sub functions that have both points of intersection with...
Jul27-09 01:15 PM
2 3,020
Can anyone help me rearrange this equation so that t is isolated please, it's driving me nuts. x = tB + (1 - t)A ...
Jul27-09 08:01 AM
14 928
Hi guys whats up. I just have a small question i wish to ask. If you are given vertex(-2,3) and it passes through...
Jul26-09 02:24 PM
6 1,444
NOTE: plz ignore the in maple part of this! hi everyone, is there a quick way i can graph f(x,y) = 0 in maple? I've...
Jul26-09 12:46 PM
2 3,769
I was looking at some of the questions from various competitions for high schools and colleges and their questions,...
Jul24-09 05:03 AM
2 2,847
Alright, I have a question that I know is very dumb, but despite my best efforts I've been unable to come up with an...
Jul23-09 02:55 PM
13 3,848 I have some down time for the next 3 months and figured I might as...
Jul23-09 08:24 AM
8 1,198
I've been typing up all my papers/homework in Maple 12 but numerous professors have suggested I get LaTeX or Tek (is...
Jul23-09 06:44 AM
5 795
Frequently, I have encountered optimization problems which involve finding the optimal function to maximize the ratio...
Jul23-09 05:29 AM
3 2,630
I haven't had much exposure to limits and trying to understand it by myself has lead me into deep realms of...
Jul22-09 11:52 PM
18 2,317
How would one solve the equation f '(-2x) + g '(4x) = - x?
Jul22-09 06:51 PM
3 1,214
i know this is possible to find with iteration, but is it possible to find it algebraically?
Jul22-09 04:31 PM
6 1,668
Hi there, I have a big problem following the derivation in the following paper: ...
Jul22-09 02:27 PM
0 870
Hello all, From the table of integrals we have the following indentity: vK_v(z)+z\frac{d}{dz}K_v(z)=-zk_{v-1}(z)...
Jul22-09 12:47 PM
0 627
who can help me to run this code in matlab? I run it in my computer but the result is totally different from the book!...
Jul22-09 07:43 AM
4 1,998
Given the radius and pitch , how can we compute the length of a helix??
Jul22-09 05:09 AM
1 6,337
This came up a while ago in a post. What is a sensible way of defining a "random" curve in R^n? Let's say n=2 in order...
Jul21-09 05:59 PM
15 1,282
how can i proove or disproove that the sum of a prime numbers which equals to other prime numbers is a prime number?...
Jul21-09 05:20 PM
10 10,000
Is it possible to calculate the greatest common divisor of decimals and fractions? As far as I know, the greatest...
Jul21-09 07:10 AM
2 6,128
I've always just accepted that x^\frac{1}{2}=\sqrt{x} but I don't understand why. I guess I'm looking for a proof for...
Jul21-09 06:55 AM
6 6,107
Hello, I am trying to find how a random variable will transform once gone through a filter. For example, I...
Jul21-09 12:28 AM
0 647

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