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

Feb2313 09:23 AM
micromass

1 
33,261 
Hello,
I am curious, suppose I have a function of x, f(x). Suppose I also have another function P(x). Does this...

Sep2913 08:52 PM
Robert1986

1 
573 
In math, many of the most fundamental theorems and structures rely on the concept of an infinity.
For example, we...

Sep2913 01:34 PM
johnqwertyful

5 
547 
Equations that have x^3 or x^4 etc...,are solved with method of Horner.
There is quicker way to solve an equation...

Sep2913 12:15 PM
h6ss

1 
512 
Hi I am looking for the proper notation to represent angle wrapping in a mathematical function.
For example if I...

Sep2913 12:14 PM
Office_Shredder

4 
392 
i have a vector xK where k is the unit vector perpendicular to other unit vectors i and j
when i multiply a force...

Sep2813 03:41 PM
mathman

3 
621 
Is \vec{a}+\vec{b}^{2} equal to the same thing as (\vec{a}+\vec{b})^{2}? And when is it equal to √(a^{2}+b^{2})?
...

Sep2713 02:09 AM
M. next

5 
513 
My textbook explains how the limit of x^n/(n!) as n→∞ equals 0, x ∈ ℝ. Since a(n) = x^n/(n!) and a(n+1) =...

Sep2613 11:37 PM
chiro

4 
496 
http://img59.imageshack.us/img59/6414/puag.png
The picture above is used to help understand artificial neural...

Sep2613 07:26 PM
CraigH

6 
514 
Hi,
I was wondering if anyone could help me with this problem on a closed natural cubic spline.
given the...

Sep2613 09:04 AM
RacingFan

0 
477 
I came up with an illdefined problem that I'm not sure on how to approach:
We have X€R^2 space and I(X)€{0,1}. If...

Sep2613 05:12 AM
Swimmingly!

0 
456 
Are there any resources on problems of modular arithmetic?

Sep2613 05:12 AM
matqkks

0 
350 
Hi math fans,
Only me, I have been asked to do the seemingly impossible and find away of distinguishing four...

Sep2613 04:47 AM
physical101

9 
529 
For a while now I have been reading through my course material and text books which are very good at explaining...

Sep2613 04:34 AM
UltrafastPED

1 
427 
For me it's a necessary evil, I need it to do what I want to do, and part if why math usually makes me want to break...

Sep2513 08:16 PM
Mark44

11 
947 
Can someone confirm if I'm going about this the right way
If I have an event that on average has occured once every...

Sep2513 06:13 PM
Office_Shredder

1 
401 
I was thinking about this when I was trying to work out a simpler way of finding the volume of a sphere. Suppose we...

Sep2513 05:28 PM
goldust

3 
561 
It is known that prime numbers become sparser and sparser, with the average distance between one prime number and the...

Sep2413 10:28 AM
eigenperson

1 
442 
This isn't a homework problem or anything just simply curious. Which is a larger number, Graham's number or the...

Sep2313 08:58 PM
Deedlit

11 
1,009 
So if we imagine a rectangle. The aspect ratio is width/height.
What if you want the ratio of the parallel sides? Is...

Sep2313 05:19 PM
Mark44

6 
460 
I come across some odd stuff online....
...

Sep2213 08:29 AM
mfb

1 
519 
In calculus of variation, we use Euler's equation to minimize the integral.
e.g. ∫f{y,y' ;x}dx
why we treat y...

Sep2113 11:28 PM
voko

2 
533 
Suppose I take a random walk on a 2 dimensional square lattice, but this lattice plane has a finite size, e.g. Dx*Dy....

Sep2113 07:43 PM
techmologist

2 
477 
Hi,
Does the author mean that −3 × 4 = 0 − 3 × 4 = −(3 × 4) or else?
I consider the minussign to be a unary...

Sep2113 12:47 PM
Atran

7 
603 
How to determine the X coordinate of the red point if i know the Y coordinate and the angle between the adjacent side...

Sep2113 12:23 PM
Office_Shredder

4 
687 
I have a sum
\sum_{n=\infty}^{\infty} f(n)
which I do not want to consider the convergence of in the normal...

Sep2113 07:17 AM
jackmell

3 
610 
I'm just curious, but when will I know that it's not just carelessness that is causing me not to be able to do the...

Sep2013 03:03 PM
LCKurtz

1 
622 
I was pondering over this problem about ratios and wondered what does 3/2 (oranges:apples say) actually means. I then...

Sep2013 01:47 PM
symbolipoint

9 
624 
I need some help understanding inverse functions, we've had a 4page chapter covering the basics of inverse functions...

Sep1913 12:22 PM
HallsofIvy

3 
553 
While reading this paper I came across the term Cone of Influence which is described as
As an example: We have a...

Sep1913 06:59 AM
MednataMiza

0 
547 
Hi there!
I am seeking a nice formula for the following function S(k,n), k and n natural numbers, k<=n, where S(k,n)...

Sep1813 06:48 PM
arildno

8 
727 
I was always good at maths, just because primary/high school math was simple enough to find concrete examples for the...

Sep1813 05:27 PM
D H

9 
769 
Please take me seriously, I know proving Fermat last theorem is not easy but I may have just proved it for a special...

Sep1813 11:47 AM
mohamadh95

9 
865 
I'm curious if there is a way to combine sinusoids of multiple frequency into a single sinusoid?
For example, I'm...

Sep1813 09:41 AM
arildno

5 
740 
This news is a little dated, but I still found it interesting and wanted to see what everyone else thought about this...

Sep1813 07:50 AM
MostlyHarmless

20 
1,189 
Hello all,
I am currently reading about the triangle inequality, from this article...

Sep1813 07:22 AM
UltrafastPED

3 
449 
Ever since I was in grade school I have been fascinated with the idea that the Pythagorean theorem, or any other...

Sep1813 12:09 AM
Mark44

4 
777 
I'm doing a proof, and near the last step I want to write the expression,
\frac{d}{dt} \det{A(t)} =...

Sep1713 11:55 PM
dipole

2 
754 
I am looking for a counting interpretation to make the following identity evident:
...

Sep1713 08:59 PM
techmologist

2 
464 
In Spivak's Calculus, Chapter 1, pg 12, theorem 1, it says that in order to prove that theorem: a + b <= a +...

Sep1713 06:46 PM
Office_Shredder

1 
489 
I run this channel
http://www.youtube.com/user/PhysicsAtTen
and NEED your help!
Please give me ideas to work on...

Sep1713 05:03 PM
Yosty22

1 
594 