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

Feb2313 09:24 AM
micromass

1 
46,223 
Can anybody please show me an example of a convergent sequence of real valued functions of a real variable where the...

Oct1209 07:45 PM
symbol0

4 
1,391 
I need to compute the normal velocity of an evolving front in two dimensions (x,y). Let's say that I have collected...

Oct1209 02:39 PM
HughJass

0 
1,437 
Hello people,
I'm creating an algorithm on Matlab and need to find the distance between two points in spherical...

Oct1209 02:05 PM
TheDestroyer

5 
20,538 
i have these two question i need help
1. given y=3x2 find the percentage error in y if there is a 3.5% in the...

Oct1209 01:02 PM
LCKurtz

1 
935 
How close to 4 do we have to take x so that 3x + 2 is within a distance of (a) 0.1 and (b) 0.01 from 14?
...

Oct1209 01:01 PM
LCKurtz

1 
528 
is this trick valid at least in the 'regularization' sense ?? for example
\int_{\infty}^{\infty}...

Oct1209 07:36 AM
g_edgar

4 
997 
I'm having trouble calculating an integral:
\int_0^1{\frac{1}{1+\sqrt{x}}dx}
I decided to do a substitution:
...

Oct1209 05:22 AM
dragonblood

5 
21,113 
I've been trying to prove that if the following statement holds for all (x,y)ER^2, f must be a linear function:
...

Oct1209 01:09 AM
arildno

1 
946 
Preparing for the math test, and cannot understand what to do for one of my practice problems:
I need to find if...

Oct1109 04:29 PM
dlevanchuk

3 
4,431 
Hi,
Can anyone help me integrate :
Integral sqrt ( 4  x^2) dx
Some ideas:
Make a subsitution x2 = cos...

Oct1109 02:12 PM
pjkily

24 
63,403 
I'm a physics major (undergrad) who wants to learn real and complex analysis, but don't have the time to do the...

Oct1109 01:41 PM
profanilp

4 
6,070 
My course is using Rudin, however I've heard that it's not the best text for learning measure theory and extremely...

Oct1109 01:39 PM
profanilp

4 
4,815 
I was given f(x,y,z) = x4 + y4 + z4  x2  y2  z2.
I found that (or least I think it's these) x = 0 & \pm1/\sqrt{2},...

Oct909 09:43 PM
squenshl

2 
736 
1. The problem statement, all variables and given/known data
Can someone help me take the derivative of the integral...

Oct909 07:20 PM
LCKurtz

3 
977 
Can you always just swap the limits of integration and flip the sign of a onedimensional integral or is there a time...

Oct909 05:46 PM
Pythagorean

2 
7,988 
Hi,
Im having trouble understanding something in one of my Dynamics lectures.
The lecturer said that:
dr/dt...

Oct909 12:49 PM
HallsofIvy

2 
1,186 
given sequences \left\{x_n\right\}, \left\{y_n\right\}, is it true that
\sqrt{ \Sigma_{n=1}^{\infty} (x_n  y_n)^2}...

Oct909 09:31 AM
statdad

6 
3,908 
Can someone explain to me this equation I stuck with. I can't get the right part of it. ...

Oct909 03:33 AM
MythSquare

4 
851 
How do you compute the area defined by a rope which spirals around a circle?
Here is a specific example of what I...

Oct809 09:15 PM
lanedance

3 
1,575 
Hi, I'm from in Brasil and I need some help..
I have no sucess resolving Integral dx ..
Using Integration by...

Oct809 05:29 PM
SELFMADE

7 
25,951 
I guess the following identity isn't right. Can anyone tell me what the LHS is really equal to?...

Oct809 02:05 PM
tinytim

1 
1,096 
what potential applications has the RiemannHilbert problem?
is there more than one RiemannHilbert problem ? for...

Oct809 02:03 PM
zetafunction

0 
724 
I want to ask if you how to compute such integral like:
int(t**2*BesselJ(1,a*t)*BesselJ(1,b*t)*BesselJ(1,c*t),...

Oct809 08:19 AM
g_edgar

1 
1,199 
So, a certain discussion occured in class today...
If f is differentiable, is f ' continuous?
At first sight,...

Oct809 06:14 AM
HallsofIvy

5 
946 
So I have a matrix of electric potentials in excel that were experimentally attained, effectively a scalar field...

Oct709 06:04 PM
n1person

0 
2,672 
Hi all,
Been a looooong time since I had to use calculus for anything, but I distinctly remember failing this...

Oct709 03:30 PM
chroot

1 
794 
Excuse me my lack of expertise, but it is very curious. Recently, I have found a note, which I qualify 'absolutely...

Oct709 10:34 AM
lurflurf

9 
3,060 
x/
I'm wondering if it's even possible to imagine what a graph of this fxn would look like, or do you definitely...

Oct609 02:13 PM
Jules18

2 
770 
Let M be a subspace of l^infinity consisting of all sequences x = (x_j) with at most finitely many nonzero terms. Find...

Oct609 11:36 AM
Domnu

18 
9,961 
I evaluated a limit which is
I plugged value 2 into the limit. So, 2(4)+8/22 and I got 0/0.
However, I came up...

Oct609 10:57 AM
stanton

4 
782 
To calculate the centroid of a cone, it seems that you have to use calculus. It comes out to be h/4, where h is the...

Oct509 11:27 PM
bhh1988

1 
2,887 
A CAT scan produces equally spaced crosssectional views of a human organ that provide information about the organ...

Oct509 09:25 PM
Integral

1 
2,814 
Consider a (possibly complexvalued) function F(z) = F(x,y) of two variables. Can it make sense to talk about the...

Oct509 07:16 PM
HallsofIvy

4 
6,057 
Is there a convenient sufficient condition for knowing whether a function of two variables is differentiable? Isn't it...

Oct509 03:51 PM
wofsy

3 
6,729 
Is saying "f is differentiable" equivalent to saying "f is analytic/holomorphic?"
Also, does it make sense to talk...

Oct509 11:35 AM
Petek

3 
1,416 
I have no idea where to start with this. Sorry about the format, I don't know where to make it into an easier to read...

Oct509 06:28 AM
arildno

3 
1,744 
given a differentiable function g(x) we know that in many cases if we define g(nx) for n> oo , then we have no...

Oct509 06:01 AM
zetafunction

0 
632 
Question: Attached.
Attempt.
I know I have to find P1 and p2 depending on x and L to satisfy
ax^2 + bxy +...

Oct509 03:46 AM
Niall101

2 
704 
I am reading an example from a book on Volterra equations but there's one point i dont understand. the book says:
for...

Oct409 05:33 PM
tinytim

3 
685 
Hey guys, this isn't a math problem for homework or for a course, but simply for my own interest... This is one that I...

Oct409 05:03 PM
LCKurtz

1 
1,313 