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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.
Aug31-14 03:38 AM Yashbhatt 
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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
micromass
1 39,009
Hello, I am trying to calculate normal vector for surface F Nf (see attached picture) to calculate velocity component...
Aug4-09 06:26 AM
andykol
5 9,980
I need to solve for t and it's slipped my mind how to manipulate this. \frac{1}{4}=te^{-8t} to ln(1/4)=lnt-8t...
Aug4-09 01:36 AM
John Creighto
9 1,581
Hi all, Does anybody know of any graduate level math texts with extremely difficult problem sets (olympiad level...
Aug4-09 12:25 AM
bpet
7 1,677
Hi, I am trying to graph (x+(1/√(1+cos(x)))) in mathematica, and i used Plot but I am not getting an...
Aug3-09 04:23 PM
slider142
2 8,211
I would like to compute the power distribution that maximizes the sum data rate of a certain communication scheme. The...
Aug3-09 11:10 AM
miggimig
0 669
I apologies if this is in the wrong place!!! I'm a Computer science person with a keen interest in maths and...
Aug3-09 03:28 AM
sam_wilson
4 903
Hello, Can we interchange the natural logarithm "ln" operator and the integral operator? Regards
Aug2-09 01:55 PM
g_edgar
2 2,039
So today I wanted to prove that x/(x-k) is continuous for x\neq k. I have to show that for all \varepsilon>0 there...
Aug1-09 05:50 PM
jgens
1 801
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
HallsofIvy
5 807
Can somebody demonstrate : \{{n!}}}} < \left( {1 + \frac{1}{n}} \right)^n \] ITS not A HOMEWORK
Aug1-09 09:40 AM
Arhimede
13 1,208
Hello, I came across a text saying that if \int^{\infty}_{-\infty}P(x)=1 then...
Aug1-09 05:51 AM
Boxc
1 640
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
Boxc
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
symbolipoint
2 903
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
cshum00
1 766
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
uart
3 1,195
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
n!kofeyn
6 1,419
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
n!kofeyn
1 1,132
Hi every body I am trying to intergrate the following function using Maple: ...
Jul29-09 07:51 PM
g_edgar
1 876
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
ryanj123
4 6,217
Hey, I was wondering. Since the Fourier Series coefficients can just be represented in the form of a Fourier...
Jul28-09 09:49 PM
jasonRF
9 6,581
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
flatmaster
1 2,816
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
dx
2 1,023
In an experiment I am performing, I observed the following: Result is directly proportional to A Result is...
Jul27-09 11:19 PM
EliteLegend
4 983
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
flatmaster
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
S_David
18 2,251
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
n!kofeyn
4 2,436
Thanks
Jul27-09 01:27 PM
n!kofeyn
6 1,051
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
HallsofIvy
2 3,022
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
HallsofIvy
14 931
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
cruisx
6 1,445
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
uart
2 3,772
I was looking at some of the questions from various competitions for high schools and colleges and their questions,...
Jul24-09 05:03 AM
gunch
2 2,850
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
YellowPeril
13 3,860
http://library.thinkquest.org/10796/ch1/ch1.htm I have some down time for the next 3 months and figured I might as...
Jul23-09 08:24 AM
hassman
8 1,200
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
Edgardo
5 796
Frequently, I have encountered optimization problems which involve finding the optimal function to maximize the ratio...
Jul23-09 05:29 AM
arildno
3 2,634
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
n!kofeyn
18 2,329
How would one solve the equation f '(-2x) + g '(4x) = - x?
Jul22-09 06:51 PM
Hurkyl
3 1,215
i know this is possible to find with iteration, but is it possible to find it algebraically?
Jul22-09 04:31 PM
3hlang
6 1,670
Hi there, I have a big problem following the derivation in the following paper: ...
Jul22-09 02:27 PM
Bazman
0 870

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