
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:23 AM
micromass

1 
36,937 
I came across something from the higher classes of math and I tried to prove it:
What do you call this kind of...

Jul907 04:43 PM
okunyg

8 
1,795 
Greetings,
I'm curious if "magic squares" have been found to be useful in mathematical or scientific endeavors...

Jul907 07:45 AM
HallsofIvy

3 
2,620 
Greetings,
I suppose all of us have at one time or another been fascinated by "magic squares"
My question is: has...

Jul907 06:45 AM
Qaiser Raza

8 
3,104 
"The arrangement of numbers with n rows and n columns to be a true magic square is that it contains all the integers...

Jul907 06:38 AM
Qaiser Raza

9 
2,607 
Lets say i have two sets of numbers (dealing with real numbers only):
\{ x \in R x \ge 0\}
\{ x \in R 3...

Jul807 10:19 PM
danago

3 
3,033 
can somebody prove that for all a,b,c>0:
a/(b+c) + b/(a+c) + c/(a+b) >= 3/2

Jul807 05:00 PM
morphism

1 
1,412 
Hi I have some problems with really basic equations (really elementary)
Let's say in order to solve an equation...

Jul807 02:44 AM
truewt

2 
1,816 
I think this belongs here, because it's not specifically differential geometry (well, that's an assumption, I don't...

Jul607 11:11 AM
Yersinia Pestis

0 
1,030 
I'm planning on taking a limits and infinite series course soon and was wondering what book(s) I could get off Amazon...

Jul607 08:40 AM
Edgardo

6 
1,956 
W*C^(Z/A) = X*C^(Y/A)  D*X + D*W
How do you go about solving for A?
Known: C>1
Also, if it makes it easier (it...

Jul607 08:34 AM
davee123

2 
1,474 
Back in the fractal craze, I wrote a simple application to generate the Mandelbrot set, and after way too many wasted...

Jul507 10:41 PM
ktoz

2 
943 
quick question:
how does this work (root)72 = 6(root)2
and what is this technique called?

Jul507 06:15 PM
Kurdt

2 
944 
a^(1/(2)^1/2))
that is a raised to the power 1/underroot(2)

Jul507 05:06 AM
HallsofIvy

2 
1,267 
Followup:
Suppose we have 2^9 ways of choosing topics on a pizza. Then, if we want different topics on 3 pizzas, we...

Jul407 09:30 PM
sk381

2 
917 
Hi, I am interested in knowing what the names of the english math books are for the school you begin on when you are...

Jul407 05:21 PM
disregardthat

15 
4,307 
My friend says that : If there are 9 different toppings then the number of ways to choose toppings for one pizza is ...

Jul407 05:21 PM
Werg22

4 
1,093 
hi
i'm confused at to how my textbook has done the following cancelling :S. hope you can clear things up for me :D...

Jul307 01:30 PM
Trail_Builder

2 
1,188 
cos(2x)=2cos^2(x)1
what algebrical rule guarantees me thet is right to divide both angles for 2:...

Jul307 11:46 AM
uart

1 
1,846 
when there is enough block ... here is my problem.
a hyperbola having F(5,0) and D(5,0) and difference of focal...

Jul307 11:44 AM
threetheoreom

2 
1,244 
Newby here.
Can someone summarize Godel's Theorems for me?
I'm not very knowledgeable on such things, but would...

Jul207 05:06 PM
matt grime

8 
1,758 
Just want a check of this please:
We have a complex equation of the form az+bz*+c=0
where a, b and z are complex...

Jul207 10:49 AM
loonychune

3 
2,483 
i just cant figure this out.
given a n x n matrix (with n>1) "A" such that all entries are integers and A is...

Jul207 09:43 AM
Kummer

4 
2,245 
How important is it to you to understand the math your applying? I am decent at math when it comes to remembering...

Jul207 06:29 AM
morson

7 
1,461 
im so embarrased askin so much :blushing:
show that given 5 distinct lattice points in the plane (points with...

Jul107 07:50 PM
Kummer

1 
918 
people discuss only distances between points but why not within a point itself ?
i think a point also has a distance,...

Jul107 06:58 PM
HallsofIvy

13 
1,356 
stupid error in the "tex" thing, see first post.

Jul107 12:35 PM
Trail_Builder

7 
1,362 
During my freshman year at Yale, I took a course in multivariable calculus under the tutelage of Prof. Serge Lang. He...

Jul107 08:40 AM
mathwonk

14 
4,949 
lol if you have time for a 6minute video watch this homeless guy is talking about suposed nonlinear algebra. I...

Jun3007 10:26 PM
Hurkyl

20 
4,251 
What would be the practical effects if it is proved that P=NP and an efficient polynomial time algorithm is found for...

Jun2907 06:25 PM
Reverie

9 
1,538 
Do you find that after doing a few hours of math it's harder than usual to follow conversations or form sentences?...

Jun2907 07:57 AM
Gib Z

7 
1,367 
hey does anyone know if studying fourier analysis is going to aid in physics, particularly in string theory or quantum...

Jun2907 01:51 AM
Reverie

3 
1,208 
I have a set of data points relating the width of an object in an image to its distance from the camera. I'd like to...

Jun2807 03:46 PM
Feldoh

9 
2,667 
how are the secret codes for recharging the credit of a phone or the secret credit card numbers gnerated? i hrd...

Jun2807 03:43 PM
Feldoh

3 
1,448 
Hi I am reading the book "Introduction to logic and the methodology of deductive sciences" and I'm doing my best on...

Jun2807 03:52 AM
fopc

7 
1,650 
OK...a friend of mine sent me this brain teaser and I havent been able to crack it...I'm starting to think that maybe...

Jun2707 10:21 PM
ice109

5 
2,974 
So I was having a conversation with the guy I share an office with and I brought up the gaussian distribution to show...

Jun2707 09:12 PM
chroot

8 
2,595 
what are some for evaluating logs? square roots? trig functions? this makes me curious
obviously i don't...

Jun2607 08:12 AM
Gib Z

6 
1,208 
Hello.
I have this page.I don't know from what book these questions are taken.
If anyone knows please tell me the...

Jun2507 03:50 AM
Aladin

2 
1,877 
http://arxiv.org/abs/0706.3342
The Forgotten Night: The Number Devil Explores Spherical Geometry
Marissa L. Weichman...

Jun2407 09:57 PM
mongoose

3 
1,878 
In my book and in other places, they give this rule to obtain the domain for
a compound function: "the domain of (f...

Jun2307 12:04 PM
Hurkyl

7 
3,562 