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

Feb2313 09:23 AM
micromass

1 
37,990 
I've been clawing at my mind for a while regarding this, I pray somebody can help me.
I was implementing a method...

Aug1110 10:04 AM
dodo21

6 
1,911 
I hope this the right place to post my question...
http://i912.photobucket.com/albums/ac325/marwaibrahim/2.jpg
...

Aug1110 09:58 AM
TrifidBlue

2 
1,444 
How can the function
f: ℝ² → ℝ : (x,y) > {{x^3y^3}\over{xy}} if x ≠ y
be defined on the line y=x so that we...

Aug1110 08:43 AM
Alexx1

2 
1,007 
How can the function
f: ℝ² → ℝ : (x,y) > {{x^2+y^2(x^3y^3)}\over{x^2+y^2}} if (x,y) ≠ (0,0)
be defined in...

Aug1110 08:10 AM
Alexx1

4 
1,755 
Hi,
I'm modeling receptors moving along a cell surface that interact with proteins inside of a cell. I figured it...

Aug1010 11:08 PM
mathman

2 
2,030 
Hey guys.
We are using the chi squared test to determine if there is a significant difference in the observed data...

Aug1010 09:06 PM
zahly

0 
894 
I am performing one experiment in which I have a system output as Q which fundamentally depends on 3 independent...

Aug1010 02:48 PM
hotvette

1 
1,102 
We all know BEDMAS from grade school: brackets, exponents, division, multiplication, addition, subtraction. My...

Aug910 09:07 AM
Petr Mugver

6 
4,380 
Does
\lim_{n \rightarrow \infty} \sum^{n}_{i=1} 1/n
Equal: one, zero, or something else?

Aug910 08:41 AM
arildno

32 
4,896 
I am a college physics grad. For many subtopics of precalculus or calculus, the following statement applies to me:
...

Aug810 10:52 PM
Xtensity

1 
984 
Hello;
Can you identify a pattern in this sequence of numbers (a recurrence relation)?
1, 3, 5, 9, 13, 17, 25,...

Aug810 03:39 PM
FeDeX_LaTeX

2 
2,575 
Hello;
This is not a homework question, but something I was wondering about solving difference equations.
For...

Aug810 01:19 PM
FeDeX_LaTeX

7 
5,195 
Hi, I'm trying to get this working for a program I'm making. I've been working on this for a while, but I can't seem...

Aug810 05:06 AM
Petr Mugver

3 
2,072 
I just started reading the introductory section of Spivak's calculus, and it has an introduction about the main...

Aug710 04:10 PM
Mark44

2 
900 
im just curious. is there a formula for the fibonacci formula in terms of..well terms. like the nth term =..?
iv...

Aug710 02:55 AM
FeDeX_LaTeX

8 
15,222 
When calculating the angle between two vectors, I take the inverse cosine of the dot product of the two vectors...

Aug610 08:04 AM
Petr Mugver

3 
2,543 
Can someone show me why the derivative of
k(x) = cot x
Is
k'(x) = cosec^2 x
And not

Aug610 04:52 AM
tomwilliam

7 
1,637 
Hello all, this is my first post here.
Got into a debate over when a deck of cards drawn without replacement is...

Aug610 03:26 AM
schwanky7

7 
11,233 
I am new to Calculus. I know that the rate of change in some thing is called it's derivative or we differentiate...

Aug510 04:01 PM
Bohrok

2 
1,174 
I've been working through the book The Story of i(sqrt of 1). It's kinda like a story with a lot of Math. The first 2...

Aug510 03:44 PM
Kreizhn

3 
1,187 
Adults need 2.5" between Eyes, but this is too far for kids eyes.
Adults = 2.5" = 52 Pixels difference = left eye 26...

Aug510 02:13 PM
Telushomey

4 
1,996 
I read through that 800 something page Dover book on differential equations, but I feel like I haven't had enough...

Aug510 11:09 AM
gobberpooper

3 
4,702 
1) Is there any way to find integer solutions for a linear equation ax+by=c, with a,b,c known and without having an...

Aug510 08:59 AM
smslca

2 
2,207 
ok this seems like a predominantly maths problem but i need it for a little project of mine related to classical...

Aug510 05:59 AM
Ketsha

4 
1,035 
I am wondering if anyone can tell me how to get Mathematica to recognize the product of two variables so that I can do...

Aug410 09:00 PM
jgm340

1 
1,213 
Hello guys. I'm trying to create a formula here, and I got stuck at this step, where I have to calculate the following...

Aug410 05:34 PM
LucasGB

9 
1,447 
Okay so this seems like a very simple problem to me but I can't figure it out so I definitely need some help. I'm not...

Aug410 05:08 PM
Mark44

48 
14,812 
I'm going to guess that mine isn't the first "speeding ticket" question ever posted here, but I'm having a tough time...

Aug410 04:10 PM
MisterM

2 
1,563 
Hello. Up until this point I have been solving this numerically, by propagating the state vectors and checking for a...

Aug410 02:34 PM
Mentallic

12 
1,563 
Everyone knows by now that a conic section is the figure formed when a plane intersects a right circular cone. Most...

Aug410 02:26 PM
CarlisleLes

4 
1,462 
This is going to be a weird question, but in textbooks when we're given the two spaces R^n and R^m, and they say...

Aug410 07:11 AM
HallsofIvy

4 
1,457 
Hello,
I apologize in advance for the odd nature of this question. Can anyone recommend any renowned old (circa...

Aug310 05:03 PM
awkward

2 
3,081 
Being a 4th year mech. engineering student, you would think I could figure this out. But, for some reason, I can't...

Aug310 09:12 AM
Mute

2 
2,018 
I am doing a summer project where i have got lab data of fluxuating flow patterns in a flume, the data i have plots...

Aug310 04:36 AM
nemesis24

7 
1,503 
If we know that x + y = z, can we find out what xy = ?
This is what I did. Say z = 5
x + y = z
x + y = 5
y = 5...

Aug310 12:57 AM
CRGreathouse

4 
1,049 
So for a while i have been wondering if there was a way to find a point a certain distance along a linear function, so...

Aug310 12:21 AM
physicisTboB

17 
25,943 
Hi
For small angles or points near the vertex of a parabola we can approximate a parabolic surface with a circle....

Aug210 06:37 AM
HallsofIvy

1 
1,822 
Hi,
I want to sum the following expression
R(m)=sum(u(k)*u(mk1)) for k=0 to m1
in matlab for each mth ...

Aug210 04:13 AM
anant

0 
862 
what's the general solution for x in the following equation
x=cN^{\left(\frac{1+x}{1x}\right)}
i could...

Aug110 09:08 PM
Mentallic

6 
1,424 
Hi!,
I'm well into the world of computer graphics. Love to say it was great but well, it isn't.
I would like to...

Jul3110 10:22 PM
Adder_Noir

1 
765 