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

Feb2313 09:23 AM
micromass

1 
38,997 
just revising for gcse's and there always seems to be a question with three unknown denominators and you have to...

Nov1210 07:10 PM
statdad

4 
1,301 
Hi members,
Could any one help me with the problem following?
If x is a real number and P is a polynomial...

Nov1210 06:32 PM
lobsterism

3 
1,386 
In Rudin's book Functional Analysis, he makes the following claim about the interior A^\circ of a subset A of a...

Nov1210 02:42 PM
Landau

1 
685 
Does anyone know of a good book for relearning and working with different cooridinate systems
like
polar ...

Nov1210 12:11 PM
berkeman

1 
815 
So say I have n real number to chose in the range , and the first and last are 0 and 1. So in essence my problem is to...

Nov1210 08:46 AM
uart

2 
1,287 
Hello,
I know how to get the full fourier series with complex coefficients and with real coefficients, and I know...

Nov1110 10:20 PM
theneedtoknow

2 
2,702 
Sorry, wrong title...

Nov1110 08:57 PM
k_squared

0 
439 
I remember reading a theorem that said that for an n x n matrix A, there exists a basis of Cn consisting of...

Nov1110 07:27 PM
mathwonk

5 
2,209 
Hello maths masters...
I donot know how to solve trignometric equations, let me give you people a few examples and...

Nov1110 03:59 PM
Integral

9 
1,822 
Hi folks,
I have a differential equation which looks like
sin(f) + \frac{1}{Q}\frac{d(f)}{dt} + \frac{d^2(f)}{d...

Nov1110 03:15 PM
CompuChip

4 
736 
Hello, please could someone explain how to prove the BolzanoWeierstrass Theorem?
thank you

Nov1110 01:32 PM
mathwonk

3 
1,886 
I am having difficulty trying to rearrange this equation to solve for one unknown variable.
...

Nov1110 12:23 PM
CompuChip

1 
1,912 
Hi guys,
I am a sophomore
I am having a trouble that I often make careless mistakes,
and it caused me directly...

Nov1110 05:59 AM
D H

10 
2,807 
I know this is a silly question for a 12th grader to ask but I don't know the exact rules.
If we divide 950 by 121,...

Nov1110 03:42 AM
zorro

8 
1,464 
ok letsa say i have d/dt {(u(2t) + u(t2)}
I know that d/dt { u(t) } is q(t)...
now is it correct to think...

Nov1110 01:46 AM
matematikawan

7 
2,923 
I am trying to portray a method of time travel on another thread. I have no maths. It's NOT helping. I was...

Nov1010 11:25 PM
willem2

4 
1,617 
For determination of the distance from a certain point, a function should be used. Namely, the input values 'x' are...

Nov1010 04:56 AM
onako

8 
2,683 
Suppose I had an infinitely large book that had every real number between 0 and 10. I open this book at random and...

Nov1010 04:29 AM
disregardthat

2 
636 
If you have not read my previous threads, you should know I am in 8th grade. For one, I have been wanting to do this...

Nov910 10:39 PM
bpet

7 
5,704 
I use a Casio fx991MS calculator.
I observed this strange thing during some calculations.
Setting up the calculator...

Nov910 09:42 PM
Redbelly98

18 
4,080 
I have an equation as follows:
A*Q*B=C
Here A is 2X4 known matrix
Q is a 4X4 unknown matrix
...

Nov910 03:30 PM
D H

12 
10,584 
I was doing tech support at a healthcare conference over the weekend in which one of the speakers talked about stats...

Nov910 01:33 PM
DaveC426913

4 
1,585 
So if I'm changing from variables x,y to variables \alpha = f(x,y), \beta = g(x,y), what exactly does it mean to stay...

Nov910 12:07 PM
ulriksvensson

2 
729 
Does anyone have any suggestions on a functional, algebraic form to parameterize the edge of the shapes shown in the...

Nov910 05:36 AM
Petr Mugver

1 
1,057 
I'm dabbling in computer graphics and a game engine (Blender). I want to create a snowboard/ski simulation that is...

Nov810 09:17 PM
kballing

2 
1,479 
A passage from "Excursions in Number Theory":
"A transcendental number is not a solution of any algebraic equation....

Nov810 03:55 PM
CRGreathouse

5 
1,639 
Hi,
I am following this article http://en.wikipedia.org/wiki/Computation_of_CRC and I am able to understand quite...

Nov810 04:16 AM
nascentmind

0 
1,024 
I have 6 equations and 6 variables I want to solve for:
http://people.virginia.edu/~km2mr/Untitled.jpg
What...

Nov810 02:00 AM
willem2

1 
710 
This is taken from Wikipedia:
Many of the methods for calculating square roots of a positive real number S require...

Nov710 09:30 PM
LCKurtz

1 
1,372 
"Infinitely repeating decimals may not exit, they may terminate somewhere down the line but we can never tell."
...

Nov710 03:11 PM
arildno

6 
904 
I've been doing some math contest stuff, and I find a lot of questions that's like 3 different variables, with 2...

Nov710 01:29 PM
Mark44

7 
1,707 
The number of sides of two regular polygons are in the ratio 5:4 and the difference between their interior angles is 6...

Nov710 08:02 AM
arildno

2 
2,024 
Hello!
Is there a simple way to identify a nonlinear equation or physical system by looking at it?
I have sifted...

Nov710 06:59 AM
colldood

27 
8,218 
I want to teach myself this, and I have a friend that is captain of his math team to help me, and Physics Forums as...

Nov610 10:49 PM
symbolipoint

6 
3,243 
Problem: Given a circle of radius 1. Take a sector of this circle with internal angle A, where 0=<A=<pi/2. Find a...

Nov510 02:36 PM
zgozvrm

15 
1,362 
In my textbook, the proof for demorgan's law,
(AintersectionB)* = A*unionB*
starts with,saying that for all x...

Nov510 08:15 AM
JonF

2 
2,227 
What does it mean if a line in R^3 is parallel to the xyplane but not to any of the axes. I really don't know what...

Nov410 11:14 PM
kerrwilk

2 
1,015 
Can a function involve a mapping into or out of a null set?

Nov410 10:11 PM
CRGreathouse

2 
821 
I'm reading an example in the book, and I simply can't wrap my mind around it...
It's claiming you invest $1000 and...

Nov410 10:08 PM
CRGreathouse

3 
2,454 
If I want to learn about tensor mathematics  where do I need to start (i.e. what precursory mathematical knowledge...

Nov410 05:32 PM
mtc1973

3 
726 