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

Feb2313 09:23 AM
micromass

1 
39,288 
How would you expand (x+y)^0.5 ?

Sep1610 04:59 AM
Hurkyl

1 
1,686 
what is the real boundary(or difference) between discrete&continous(as the title)? my major is physics and i find that...

Sep1510 04:19 PM
awkward

3 
814 
The thing I don't understand is how does finding out the median help you drawing in the horizontal and vertical lines....

Sep1510 12:46 PM
statdad

1 
3,367 
If tan x = cos x, then what is x ? The answer includes the golden ratio !

Sep1510 08:17 AM
willem2

12 
2,356 
Hello,
I know how to figure out the formula for 1 +2 + 3 + ... + n (i.e., (1+n)n/2 ). But what is the formula for...

Sep1410 07:57 PM
awkward

11 
3,589 
I guess it has been too long since i have had to use any math beyond arithmetic. I am working on fabricating some tube...

Sep1310 11:58 PM
Mentallic

7 
4,231 
There is an article on wikipedia (here) about Fourier division algorithm, but there is something that confuses me....

Sep1310 05:42 PM
expert_vision

1 
1,867 
I know that a complex number can be written in form of a+bi and r(cos(theta) + isin(theta))
but I don't understand...

Sep1310 04:47 PM
zhermes

5 
1,961 
Hi, all:
about HMM Evaluation question:
There are 3 methods to carry out HMM evaluation.
1) forward algorithm...

Sep1310 01:21 PM
jiapei100

0 
1,386 
Hi, I need to write a 4000 word math research paper and I'm looking for a topic. Some sample topics that were given...

Sep1310 11:35 AM
desy.kris

3 
4,368 
The Earth's current Human population is 6 Billion. Some time in 1940 the world population was 3 billion and around...

Sep1310 11:08 AM
natty1905

18 
7,782 
ln(1)/i=pi
this equation does not use limits or integrals, as you can see, but it does involve imaginary numbers....

Sep1310 09:09 AM
TacTics

6 
1,553 
Problems in books that say "Show that" or "Derive this" does that qualify as a "Proof"? I spend most of my study time...

Sep1310 09:05 AM
TacTics

5 
2,111 
Hello,
I'm trying to find the inverse polynomial of y = ax^2 + bx + c in the form of x = dy^2 + ey + f.
I'm...

Sep1310 03:30 AM
Mentallic

7 
2,648 
so I've been doing review and I got stuck on two questions, I was wondering if anyone could help me out.
Any help...

Sep1310 12:49 AM
Kidphysics

3 
3,968 
I'm trying to figure out how to enter this into my calculator and get a graph, but I think it may be underpowered.
...

Sep1210 11:36 PM
LCKurtz

1 
2,297 
Hello yall im new here. Im a first year student in engineering.
I'm writing up a lab now and im supposed to be...

Sep1210 12:55 PM
OpticalSuit

2 
1,180 
The relation to be proved looks pretty simple. However, there is no evident point from whih I can start.
How do I...

Sep1210 06:13 AM
dharavsolanki

1 
1,044 
Hi all,
I have this math problem where an equilateral triangle has each of its sides divided into ratio 2:1, and a...

Sep1110 05:38 AM
desy.kris

21 
10,910 
Yesterday I thought of a math problem, and it seems very simple, as I assume the solution is, and I want to know the...

Sep1110 01:24 AM
Hurkyl

1 
782 
The polynomial is x^n + A1x^(n1) + A2x^(n2) + ... + A2x^2 + A1x + 1. Where An (integer) is not zero for all n and n...

Sep1010 04:21 PM
danieldf

2 
1,275 
A warm up problem 1
Somebody flips two coins on table, and then hides them with some two pieces of clothing.
You...

Sep1010 03:18 PM
jostpuur

14 
3,854 
could somebody better explain to me what these hat symbols mean when used with vectors.

Sep1010 09:59 AM
Mark44

1 
6,441 
Have you ever wondered the rationale behind mathematics conventions?
Why multiplication is evaluated before...

Sep1010 03:32 AM
Qu3ry

7 
2,464 
Hi everyone. I'm new posting to these forums, although I have been lurking for the past couple of months.
My...

Sep1010 12:37 AM
thrillhouse86

1 
1,607 
I know that N (natural numbers) is the set of nonnegative integers, 0, 1, 2, 3, 4...infinity, and that Z is the set...

Sep910 06:26 PM
G037H3

7 
4,373 
Hi all
I have a loglog graph as attached and would like to find the equations of the lines plotted on it. If I...

Sep910 03:43 PM
a3sportback54

0 
1,421 
so I have
2^{1990}=(199k+2)^{10}
expanding I have.
2^{1990}=2^{10}+10.2^9. (199k)+\frac{10.9}{1.2}...

Sep910 02:03 PM
dr hannibal

2 
881 
An Example Scenario:
A particle moves at 32° and collides with a wall. This wall is rectangular in nature, which...

Sep910 03:38 AM
Jesmin

4 
2,758 
Hey i have a question:
Q. One root of the cubic equation is z^3 + az + 10 = 0 is 1 + 2i.
(i). Find the value of...

Sep810 05:30 PM
jammed

10 
2,659 
Hi, my algebra skills are a bit rusty so can someone tell me if I've rearranged this equation correctly. This is the...

Sep810 04:27 PM
Borek

1 
718 
Hi, how can I work out the relationship between percentages of a whole, when one of those percentages changes? I'm...

Sep810 10:19 AM
Thetom

27 
4,026 
Suppose I wind up with the relation
f(x)\delta (xx')=g(x)\delta (xx')
true for all x'.
Can I safely...

Sep810 09:51 AM
pellman

2 
1,292 
Sorry for the wordiness of the thread title.
Basically I'm wondering, if you have two implicit functions, F(x,y)=0...

Sep810 08:51 AM
Dovetailed

0 
838 
Hi
I need to rearrange the following formula to get a(Acceleration):
s = ut1/2at
The last t is squared ...

Sep710 11:47 AM
sjb2812

13 
9,084 
If it is said that a function has nondegenerate extrema does this simply mean that the extrema are isolated?
(The...

Sep710 10:11 AM
Apteronotus

4 
2,243 
Does dx/dv = t ? Can you just manipulate equations like this?
Stu

Sep610 03:39 PM
splatcat

6 
986 
I have found out what a matrice is, but i cannot think wat an example of it would be, ive been thinkning and about it,...

Sep610 02:03 AM
disregardthat

4 
1,240 
Hello,
I have a three axis accelerometer that I am using in project that I am working on and I need to find the...

Sep510 09:22 PM
trilok

10 
16,707 
When do you become introduced to complex numbers? For example, raising functions to the power i or inputting i into...

Sep510 10:38 AM
HallsofIvy

8 
1,783 