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

Feb2313 09:24 AM
micromass

1 
46,242 
I am trying to measure a concrete structure to compute the surface area.
I have included a sketch of the structure...

Nov509 12:21 PM
jonlorio

1 
1,362 
Hello 
I have a problem in general finding the region in which the Laurent series converges...
Could someone...

Nov509 03:49 AM
Butelle

4 
963 
the idea is , do orthogonal polynomials p_{n} (x) have always REAl zeros ?
for example n=2 there is a second...

Nov509 03:46 AM
HallsofIvy

5 
1,937 
Does anyone know how to solve for x in the following equation:
x + \sqrt{x} = 6
I don't know how to solve for x...

Nov509 03:43 AM
HallsofIvy

4 
797 
How do you explicitly solve for x in terms of y using this quadratic formula?
y = 2x2 + x
I need to solve for x...

Nov509 03:36 AM
HallsofIvy

2 
1,343 
would in = an infinite amount of real possibilites if n is complex. considering that 1+0i is still a complex number,...

Nov409 05:26 AM
slider142

4 
941 
I`ve encountered this limit in a book i`ve been reading.
\lim_{t_c \rightarrow 0} \frac{1}{t_c} \int_0^{\infty}...

Nov409 04:44 AM
muballitmitte

1 
1,150 
If you have dv/dt you say to yourself its the derivative of v with respect to t. But in an example of deriving the...

Nov409 04:01 AM
HallsofIvy

9 
1,087 
How to prove the following inequality: for complex z such that Re z < 0 :
\left e^z1\right < \left z\right ?

Nov409 02:14 AM
smyroosh

2 
928 
nm, made a logical error. back to the drawing board.

Nov309 10:53 PM
TaylorWatts

0 
677 
Hi:
____________________________________________________________________
Added Nov.3, 2009
(For anyone who can't...

Nov309 03:30 PM
JG89

1 
1,442 
So I'm supposed to do this but is it just me or is it too hard to do this analytically? (I put it into wolfram online...

Nov309 07:56 AM
Pere Callahan

1 
2,256 
Please help required with this integral:
(x/(xa))^0.5 where "a" is a start distance of 10^3 and the final distance...

Nov309 07:20 AM
Per Oni

3 
943 
Is it true that every open set contains a compact set?

Nov309 06:42 AM
g_edgar

3 
2,030 
Hi all,
I'm trying to solve the definite integral between 0 and inf of:
exp(a*x^2 + b*x + c)...

Nov309 03:29 AM
fchopin

4 
1,372 
Hi,
I can't solve this integral \int^{1}_{0}\\e^{x^2}\\dx
Can I solve this integral like gaussian integral?...

Nov309 02:05 AM
Gib Z

8 
6,639 
The reason I'm posting this is because I just took an exam and this was one of the questions, and it was so easy I...

Nov209 06:56 PM
mathman

2 
759 
I need to find the volume between the cone z=sqrt(x^2+y^2) and the sphere x^2+y^2+z^2=1 that lies in the first octant....

Nov209 06:18 PM
LCKurtz

1 
2,923 
I've posted on this before and have now realised I was doing it completely wrong before but's still bugging me. I have...

Nov209 06:11 PM
LCKurtz

1 
3,497 
Hey,
I've been studying condition numbers for matrices. I found a past exam question that asks if the notion of...

Nov209 03:10 PM
hotvette

1 
2,436 
Hello everybody
I am new here, so not sure if this is really the right category.
Have recorded numerous...

Nov209 02:32 PM
Feldoh

1 
623 
By Weierstrass approximation theorem, it seems to be obvious that every continuous function has a power expansion on a...

Nov209 10:17 AM
LCKurtz

10 
5,156 
If a function can be represented by a Taylor series at x0, but only at this point, (radius of convergence = 0), is it...

Nov209 12:45 AM
edwinksl

7 
796 
I was wondering if anyone knows of an example where f and g are two functions that do not have limits at the real...

Nov109 08:06 PM
l'Hôpital

1 
1,813 
A reservoir in the shape of an inverted cone has a radius of 2 meters at the top and a depth of 6 meters. Wine is...

Nov109 06:37 AM
StalkerM

2 
3,961 
lim (x^24y^2)/(x+2y) as (x,y)>(2,1)
Does this limit go to 4 or DNE since it is undefined all along x+2y?

Nov109 06:28 AM
arildno

2 
956 
Hello,
If a function, say u, is smooth and L^2 on R^n. Will it be bounded??
In the case of n=1 I would say that...

Nov109 05:42 AM
stradlater

4 
804 
hi there,
i have problems to calculate following integral:
int{ arctan } dx
any ideas?
thanks for the help

Oct3109 07:07 AM
klaus

8 
1,032 
Hello,
I am trying to understand how to reparameterize a Hermite curve described by the parametric vector function...

Oct3109 03:03 AM
HallsofIvy

1 
1,269 
OK, this is going back to a problem I studied back in Calculus class; it's been a few years since I graduated, so bear...

Oct3009 08:54 PM
KoopaCooper

10 
2,130 
Dear All,
I am working on the wave equation in the spherical coordinate and come across with the recursive...

Oct3009 04:54 PM
kzhu

0 
941 
I couldn't figure out what to do with this type of integration \int (a x^{2}+ bx +c) ^{\frac{m}{n}}dx here m, n...

Oct3009 12:52 PM
mdnazmulh

8 
975 
I have a set of data for an absorption spectra that I plot the firtst derivative of and it gives me a gaussianish...

Oct3009 12:26 PM
Pere Callahan

1 
2,108 
Hi
I'm trying to evaluate the following indefinite integral, where s is any positive real number
\int...

Oct3009 08:01 AM
Gib Z

5 
740 
Ok, I'm trying to solve this physics problem and I've come to the following integral (d is taken to be some constant):...

Oct2909 06:50 PM
mathman

2 
1,336 
I need to find the area of the hyperbolic paraboloid z=xy contained within the cylinder x^2+y^2=1. I know I need to...

Oct2909 07:04 AM
HallsofIvy

2 
961 
Dear all,
I would like to evaluate \int\frac{1}{12sin\left(x\right)}dx
Firstly, I make use of the Weierstrass...

Oct2909 03:09 AM
tinytim

4 
961 
Here are all my problem ~
1. What's Hessian matrix ?
2. How Hessian matrix was derived ?
3. Can u recommend...

Oct2809 09:40 PM
abcdefg10645

2 
2,356 
I noticed that for partial calculus equations I can use Jacobians
\left(\frac{\partial A}{\partial...

Oct2809 04:44 PM
Gerenuk

0 
746 
hi everyone can someone please help me out. This is not homework just getting ready for school
integral of sin(x^2)

Oct2809 03:38 PM
lurflurf

14 
2,647 