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

Feb2313 09:23 AM
micromass

1 
38,928 
hello
having a set of points of a curve, how i can find the best quadratic bezier curve that fits this curve?
(so we...

Oct2307 02:42 PM
schwa

4 
15,536 
I'm having some trouble understanding how to solve for i. This is the formula for compounding intrest. I'm reading...

Oct2307 08:31 AM
HallsofIvy

3 
9,606 
I have 2 vectors with their x, y and z components.
How do I evaluate A dot B? I know it is the product of their...

Oct2207 05:44 PM
Feldoh

3 
2,624 
When looking at
w^z = e^(z log w)
I understand that adding any integer multiple of (2*pi*i) to log w is...

Oct2207 05:29 PM
hoodwink

2 
1,948 
max x1x2
s.t. x1>=0, x2>=0, cx1+x2<=1 for some c, x1<=1/2.
We know from the maximand that x1 and x2 cannot be 0....

Oct2207 04:20 PM
sapporozoe

0 
1,330 
There is a basequadrilateraled pyramid ABCDS , which base is quadrilateral ABCD. Inscribed sphere is tangent in point...

Oct2207 07:04 AM
einstein_fan

3 
1,764 
If point P(m,2m) is 5 units from the line 12x+5y=1, m could equal
a. 43/11
b.3
c.65/22
d.5
e.3
The answer is...

Oct2207 02:25 AM
rainyrabbit

4 
3,529 
Hi! I would like to fit my data to a certain function that requires averaging over a distribution, say, lognormal or...

Oct2107 10:59 PM
whynotmunot

0 
970 
Hello all
I am nearing my graduation (physics) and consider myself fluent in general English. Although I had to dig...

Oct2107 01:04 PM
robphy

14 
15,616 
can anyone help me understand the following and how to apply them:
tig identities
sum and diff. indentities...

Oct2107 08:35 AM
MagikRevolver

3 
3,193 
I was just browsing through my textbook in the section on hyperbolic trig functions. It defines sinhx to be...

Oct2107 12:21 AM
neutrino

14 
2,894 
Many abstract mathematical concepts have their intuitive correspondences or geometrical meanings. such as...

Oct2007 07:27 AM
navigator

5 
1,916 
great video on how turning a sphere inside out
http://video.google.com/videoplay?docid=6626464599825291409
...

Oct2007 06:56 AM
Trail_Builder

7 
1,778 
I was futzing around with some equations and i came across 2 problems that I'm having trouble solving.
In the first...

Oct1907 06:02 PM
Izzhov

38 
9,509 
I have a question as to why a particular space does not have a countable base. The space is the infinite Cartesian...

Oct1807 03:27 PM
morphism

7 
1,894 
I heard that Archimedes proved geometrically that the area under the curve of x^2 is equal to x^3/3. I was just...

Oct1807 02:31 PM
Feldoh

3 
2,256 
Hey, I came across this recurrence relation and was wondering if there was a closedform solution for it.
a_n =...

Oct1807 08:58 AM
MathematicalPhysicist

11 
4,782 
This has probably already been brought up at some point, but does anyone else think it is strange how much pi, the...

Oct1807 07:08 AM
Gib Z

34 
4,916 
5 players each have a deck of 52 cards. Each pick one cards from the deck.
a) what is the probability that exactly 2...

Oct1707 06:46 PM
kholden

0 
744 
I am not a math student but I have read some basic stuff about topology just because it sounded interesting, and I was...

Oct1707 06:10 PM
morphism

2 
6,492 
ok this is my problem...
i have diagonalized the A matrix with the equation P^1*A*P
and the result is J=. in order...

Oct1707 02:02 PM
panoskarti

1 
1,581 
if we consider a segment of course it's composed by infinitive points
i want to contract it and i know the avarage...

Oct1707 07:27 AM
HallsofIvy

4 
1,535 
Given a wine glass with angle theta, height h, what diameter ball, when placed in the wine glass will displace the...

Oct1607 11:31 PM
ZioX

24 
4,253 
I'm hoping someone could help me on this homework problem. I look in the book but it doesn't have anything like this...

Oct1607 10:02 AM
sandplasma

2 
1,304 
What is exactly the difference between f and f(n) and why can't we write (f \circ g)(n) as f(n) \circ g(n)?

Oct1507 09:24 AM
hashimcom

3 
1,291 
Hello all,
sorry if this is a trivial question, or if it's been asked before, but I'm not good with math terminology...

Oct1507 08:58 AM
JonasB

3 
6,101 
Overhang

Oct1407 08:59 PM
Count Iblis

0 
1,382 
hi, ive recently started looking into maths outside of class and am mostly interested in proof.
however, when...

Oct1407 04:34 PM
hashimcom

7 
1,199 
6.0221367 is a number rounded to 8 significant figures.
In a question, I am asked which of these shows correct...

Oct1407 04:06 PM
ace123

4 
1,735 
Hi,
I have a question regarding appropriate methods of finding volumes bound by geometric solids. I can work...

Oct1407 03:28 PM
NullSpaceMan

1 
2,573 
Say I have x^2 + 1 = 0 mod 7, it is clear that adding a linear polynomial congruent to 0 will give away the solution;...

Oct1407 03:17 PM
mathwonk

3 
1,415 
how do i interpret this geometrically
F^\prime(x) = \lim_{h\to 0} \frac{F(x+h)  F(x)}{h} = f(x)
that the...

Oct1407 01:22 PM
ice109

18 
2,765 
I've kind of fallen behind in my Algebra class and I really haven't read much about the theory. I'm wondering, how...

Oct1407 01:54 AM
morphism

8 
1,330 
Q:
Out of 100 ladies attending the church fete, 85 had a white handbag; 75 had black shoes; 60 carried an umbrella;...

Oct1407 01:24 AM
jd2718

4 
1,303 
I'm just checking here, but Wolfram and Wikipedia (my 2 most common and highly ranked internet mathematical...

Oct1307 01:06 PM
Dragonfall

11 
5,592 
Bill, Jack and Mike, each two of them are at the same distance (200 meters). At the same time Bill starts to chase...

Oct1307 05:41 AM
radiogaga35

30 
3,457 
Here's a problem which I encountered a while ago:
"There is an alien on the surface of a spherical planet. The...

Oct1307 01:48 AM
magic_castle32

7 
1,943 
Hello, I know the stuff about how trisecting angles using only a compass and straightedge is impossible. So then...

Oct1207 11:12 PM
111111

5 
1,563 
Anyone has suggestions for useful web resources to get prepared for the Putnam? I found some through google but I am...

Oct1207 10:38 AM
nrqed

0 
1,105 
I've got to solve this:
^13 + 7* + 5 = 0 in ring 91.
I've tried solving for ^13 and as variables in a Diophante...

Oct1207 02:18 AM
robert Ihnot

6 
1,609 