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

Feb2313 09:23 AM
micromass

1 
38,217 
Dimensions of rectangle are a=2 and b=5.
Perimeter and area P=2a+2b=14 and A=a*b=10
If we take a rope of length...

Oct1011 02:25 PM
Number Nine

3 
1,375 
This has been a curiosity of mine lately. I am wondering about what makes an algebra person an algebra person. I know...

Oct1011 07:04 AM
lavinia

4 
3,111 
Hi guys,
I'm doing some thinking about random walk.
Imagine there is a bounded 2D plane and a single spawn...

Oct911 10:20 PM
Number Nine

2 
752 
Hello,
I hope I am posting this is in the right section. It is not a home work question, it is from a solution to a...

Oct911 04:02 PM
mathman

5 
1,069 
Hi, Im having this problem with coding in mathematica
I know the elements of an upper triangular matrix, and i have...

Oct911 02:57 PM
Mugged

0 
1,102 
Hi
I was wondering about the meaning of the infinity norm
 x _\inf= max\{x_1, x_2....x_n \}
if a norm...

Oct911 06:31 AM
alecrimi

4 
3,191 
why does adding equations solve the system of equations? i've taken matrix algebra but, to be honest, was too bashful...

Oct911 03:55 AM
paulfr

5 
1,661 
Thank you to those who replied to my previous post(I had a problem repling on that post). What I was after was a...

Oct811 10:53 PM
beartopper

0 
840 
Has anybody ever come across a dataset which does the following?
I use the continuous multifractal (method of...

Oct811 06:06 AM
hamzadely

2 
1,596 
This is very basic. I have asked some friends and they dont know. I have tried resolving it by long division, and can...

Oct711 09:58 PM
symbolipoint

2 
991 
Hi,
I've done a response surface analysis, resulting in an equation of the form:
P= A + B*X + C*X^2 + D*Y +...

Oct711 02:57 PM
Mute

3 
998 
If I have log a b = c, what is the term for the value b? I know that a is the base and c is the exponent, but I...

Oct711 02:24 PM
gsal

3 
2,641 
Hi,
Could anyone give me some ideas on how to solve the following question:
log (x)  x + 2 = 0
or generally ...

Oct711 06:18 AM
jackmell

9 
5,166 
Uh, I don't know if this suits the topic, but I've been wondering about this.
Are we more times bigger than the...

Oct611 09:48 PM
U.Renko

5 
1,807 
Hey, I was wondering if I could ask for some help proving simple things in number theory, like divisibility things...

Oct611 09:21 PM
Elwin.Martin

10 
2,652 
I have done well in undergraduate mathematics, and would like to do some self study in something more advanced and...

Oct611 08:32 PM
1mmorta1

3 
927 
My supervisor always talks about how a problem is convex or its nonconvex and we want to convexify it.
I understand...

Oct611 09:35 AM
HallsofIvy

1 
1,139 
So I have a few different calculators I use. I am currently in a Calculus 1 and Physics 1 course. Both for...

Oct611 09:32 AM
HallsofIvy

14 
6,235 
I have some questions , first : in college Algebra course I didn't used to prove that y is a function of x for example...

Oct611 06:37 AM
mahmoud2011

20 
3,475 
I was wondering how they did come up with the way of setting permissions using the linux program chmod by just using...

Oct611 05:46 AM
CompuChip

4 
1,291 
Hi all,
Can someone help me understand how mathematical discoveries are evaluated? If a new finding is made, how do...

Oct611 03:16 AM
Jamma

4 
1,220 
given the x,y coordinates of two points and the radius of a curve. has anyone got a formula for calculating the...

Oct611 03:12 AM
Hootenanny

5 
1,317 
HI every one
what's the @ rule in the matlab code? especielly when we use quad command.

Oct511 05:19 PM
Apteronotus

1 
916 
the general equation for rectangular hyperbola with vertical and horizontal asymptotes is given as :
(xh)(yk)=...

Oct511 05:43 AM
gliteringstar

3 
1,915 
Hi,
Does it necessary for a differential equation to have an analytic solution?
Regards

Oct411 06:23 PM
HallsofIvy

1 
1,143 
Hi all,
I have some integrals involving Heaviside theta functions of nontrivial arguments, in particular...

Oct411 06:34 AM
muppet

0 
1,022 
What's the point of logarithms when trying to sketch functions? Isn't y=3^x the same as x=3^y? I think it should be...

Oct411 02:28 AM
symbolipoint

4 
1,144 
You have a flat wooden surface, some rope, some nails and a pencil  how do you draw parabola using just that?

Oct411 01:10 AM
michelek

17 
5,117 
Hello,
What is best suited for making cayley graphs in LaTeX?
Thank you.

Oct311 06:59 PM
micromass

1 
1,800 
Hi everybody!!
Solving a PDE for the damped wave equation I get with a solutions that part of it have the...

Oct311 04:23 PM
Mute

3 
2,225 
How can I write this is series form?
f(n) = \frac{z^n * s}{100^n} + 2*\frac{z^(n1) * s}{100^(n1)} + \frac{z^(n2)...

Oct311 12:06 AM
nickadams

4 
1,333 
I just pulled a paragraph that's giving me a headache atm.
http://img31.imageshack.us/img31/8697/unledwjt.png
...

Oct211 05:13 PM
Pyrrhus

13 
1,814 
Suppose you have the following Linear Programming problem P
Max
z = ax + by
s.t.
cx + dy = E

Oct211 05:07 PM
Pyrrhus

1 
1,645 
Hi, I want to find the maximum and minimum values of a column in a matrix.
I have a 4 column, 100 row matrix and need...

Oct211 02:19 AM
Kreizhn

1 
9,389 
I could not remember how it was called.
This was a project on the web intended to solve problems in big teams....

Oct111 11:12 PM
Bill Simpson

1 
771 
Can someone explain the Mandelbrot set to me? I know the equation is zn+1 = zn2 + c
But what does this mean? Whats...

Oct111 11:01 PM
Bacle

1 
1,216 
Hello,
This might be a simple question but I am trying to find a good method of describing a data set. I have a...

Oct111 10:06 PM
symbolipoint

3 
1,947 
I need to rank multiple "subjects" such as listing the "subjects" from best to worst. <not sure if subject is the...

Oct111 10:24 AM
wc115

0 
760 
Hello,
I have a small problem/puzzle to solve which goes as follows:
(I have already calculated it, however I am...

Oct111 08:48 AM
awkward

20 
1,866 
I apologize if this in the wrong place but I'm not sure where else to put it.
I was wondering if anybody here had...

Oct111 02:42 AM
Anonymous217

7 
4,101 