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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.
Sep15-14 01:06 PM phion 
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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 39,244
Hi Folks, Can anyone advise me on particular integrals (any relevant websites or vids)? In 'particular', I am...
Jun13-12 05:35 PM
haruspex
8 2,752
In this text, I will ask a question about the power series expansion of exponential and logarithmic integrals. Now,...
Jun13-12 09:13 PM
haruspex
1 1,245
Hi guys I am just wondering if there exists an alternate nth power function that doesn't involve any exponents. Thank...
Jun14-12 06:12 PM
eddybob123
14 2,039
theres a quadratic equation lx^2 + nx + n where its roots are in the ratio p:q .we need to prove that ...
Jun14-12 09:27 PM
Vishalrox
4 1,806
I came across this in Griffith's E&M book and can't quite figure it out. After going through the vector product rules...
Jun15-12 07:23 AM
AlephZero
9 9,252
I am quite new to mathematica so hope this is a simple problem. I would like to plot the solution of a differential...
Jun15-12 09:15 AM
IN88
0 1,155
I have two triangles in 3d. I need to calculate transformation matrix(3X3) between two triangles in 3D. 1)How can I...
Jun15-12 08:16 PM
haruspex
3 1,692
While we calculate cross product of two vectors let A and B we write ABsinθ. And while we calculate dot product of...
Jun16-12 01:20 AM
the_emi_guy
7 9,429
Hello! I am currently reviewing some basics on trigonometric identities and have noticed that nobody includes a...
Jun16-12 06:16 AM
BGN
0 770
Perhaps I should have already learned this, but I just can't seem to grasp why an angle is the ratio of two sides of a...
Jun16-12 11:28 AM
algebrat
5 1,464
is there any formula to compute the gaps between primes which could be true to all prime numbers?..thanks..please help!
Jun16-12 11:50 PM
coolul007
18 2,097
Hello, How would you discuss this system of equations by Gauss's method? ...
Jun17-12 09:56 AM
inverse
2 847
Is it possible to solve any equation if we use continued fractions? I've heard that polynomial equations could be...
Jun17-12 10:04 AM
Arian.D
0 1,004
f(x) = e^{x} f(-x) with f(x) > 0 Is there anything I can say about the general shape of this function (defined on...
Jun17-12 11:21 AM
tiny-tim
3 1,083
Hi I was wondering if there is any way to simplify this expression or if it's already in its simplest form. Thank you...
Jun17-12 05:22 PM
algebrat
10 1,506
hi, i was unfortunately unable to find any information about the order of operations in which to apply min and max....
Jun18-12 01:54 AM
haruspex
5 1,451
We know that the rationals are dense in the reals. So between any 2 reals we can find a rational. It seems to me that...
Jun18-12 03:11 AM
cragar
4 1,235
Well, I am now trying to figure out a single variable expression for Sin. I have a couple ideas using some pieces of...
Jun18-12 08:31 AM
Millennial
21 3,011
I don't see how a business owner would be interested in using inverse variation to drive his sales up. He must know...
Jun18-12 02:28 PM
moonman239
0 819
Not sure where to post this, so thought in general maths would be as good a place to start as anywhere. My question...
Jun18-12 02:46 PM
smith873
0 884
So I have a dataset... I am trying to use lets say values in column 1 to determine which values I need to plot from...
Jun18-12 05:39 PM
meldraft
1 810
(x+3)(x-4)(x-2)(x+1) = 24 Can we change it into a quadratic equation without multiplying the expressions under those...
Jun18-12 08:57 PM
pwsnafu
2 724
I have been reading on Galerkins method of weighted residuals according to which an approximate solution to a...
Jun18-12 11:25 PM
svishal03
5 1,568
This equation uniform silica particle by Aggregative growth model: I want solve this equation by Euler method by...
Jun19-12 05:11 AM
svenki7
0 668
Consider a set of n numbers, and let their arithmetic mean be X. Suppose a new number Y, is added to the set. Prove...
Jun19-12 03:18 PM
mathman
2 976
Let f(x,y) = x^2 y - xy = x(x-1)y be a polynomial in k. I am looking for the singular subset of this function. ...
Jun19-12 03:25 PM
naturemath
5 999
Just curious because it would really work into a few problems im doing
Jun19-12 08:21 PM
Curious3141
6 2,814
Hi, I am just starting to really get into math and I was wondering if there were any books for understanding math on a...
Jun19-12 11:00 PM
xavra42
9 4,601
if I have square matrix A whose decimal elements a_{i,j} = \frac{v_i}{v_j} how do I find (or approximate) the vector...
Jun20-12 02:55 AM
haruspex
1 553
Why in partial fractions does the power of the denominator have to be one more than that of the numerator, when...
Jun20-12 06:35 AM
haruspex
1 1,004
I apologise for choosing not so related topic, but I could'n find better one. I will have to read some math...
Jun20-12 06:38 AM
haruspex
3 838
How do we graph a quadratic equation in the form ax^2+bx+c =0?, or an equation like , f(x)(or y)= , where D = b^2 -...
Jun20-12 07:10 AM
HallsofIvy
4 959
How do we treat expressions under a sqaure root in inequalities ? Like for ex. x+4< Math.sqrt(-x^2-8x-12) (sorry,...
Jun20-12 11:02 AM
Diffy
1 1,065
Are there any numbers in mathematics that are not complex numbers?
Jun20-12 12:54 PM
micromass
2 736
for example i have this : F={1,2,3,4,5} so F=1,2,3,4,5 but how to randomize the set ? i want to say F=5,3,4,2,1 or...
Jun20-12 01:53 PM
Number Nine
9 1,010
u = unit of distance. Take a solid cube of dimensions (1u,1u,1u) with center at (0,0,0). Cut it straight along x, y...
Jun20-12 04:47 PM
haruspex
2 962
I just wanted to say first of all that I am not looking for any specific answers, just hoping someone could shed a...
Jun20-12 05:09 PM
SteveL27
6 1,200
Hello, I have a problem related to least square fit of data. Let me start from a step back. I have a set of points,...
Jun20-12 06:55 PM
hotvette
4 1,411
I'm writing a C++ program to brute-force solve a puzzle, but in order to determine the number of iterations the loop...
Jun20-12 07:25 PM
haruspex
1 1,008
Why does the formula /4 give the values of either of two different lengths of a rectangle? (P is perimeter and A is...
Jun20-12 10:22 PM
autodidude
3 1,012

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