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

Feb2313 09:24 AM
micromass

1 
46,525 
I deleted.

Apr2704 07:34 PM
cookiemonster

1 
1,558 
sorry
I deleted everything.

Apr2704 10:37 PM
Ebolamonk3y

2 
1,085 
An automobile manufacturer finds that 80,000 cars can be sold if each is priced at $12,000. However, the number sold...

Apr2804 06:24 PM
HallsofIvy

2 
7,227 
\sum_{n=1}^\infty\frac{\cos{\frac{n}{2}}}{n^2+4n}
Sorry I am just trying out this latex stuff as it's very new to...

Apr2904 02:22 AM
arildno

1 
1,423 
Hello, I'm considering the system:
dx/dt=yx
dy/dt=xy
I've found the fixed points and shown that this is a...

Apr2904 04:07 AM
arildno

1 
1,618 
A weight hanging on a vertical spring is set in motion with a downward velocity of 6 cm/sec from its equilibrium...

Apr2904 01:58 PM
jepe

1 
788 
hi,
this is a really simple question, what is:
(1/x^0)*x, does it give:
x^2???

Apr2904 03:55 PM
Hurkyl

1 
907 
Does anyone know of any sources that explain change of variables for double integrals. Actually, I get the change of...

Apr2904 10:39 PM
Divergent13

3 
1,468 
An archer shoots an arrow from a height of 5 ft. at an angle of inclination of 30 degrees with a velocity of 300...

Apr3004 02:33 PM
ZelmersZoetrop

3 
997 
This thing has me tearing my hair out:
Let {a0, a1,...} be a sequence such that...

Apr3004 04:06 PM
mathman

4 
956 
In the first part of the question, I proved that
\int_{1/2}^{2} \frac{ln x}{1+x^2} dx = 0
Then I needed to...

May104 02:11 PM
ReyChiquito

15 
5,758 
integral of 1/1sinx exist in 0180???

May104 06:22 PM
mathman

1 
959 
I've been working on the concept below, but have little experience with standard calculas notation and methods.
I...

May204 02:58 PM
Edwin

2 
1,349 
I noticed than in the chapters I am studying now that while they give us a formula for taking the derivative of log...

May304 12:12 AM
Math Is Hard

4 
5,372 
f(x) = x.e^(pi.x^2)
this is how I tried to do it...
f'(x) = x.(pi.2.x.e^(pi.x^2)) + 1.e^(pi.x^2)
f'(x) = (1...

May304 12:31 PM
NateTG

2 
1,060 
Because the administrators recomend to post the topics from classical geometry here, there's one covering problem,...

May304 03:21 PM
dapet

0 
1,666 
This is an easy question but can some else show/tell me how to do it:
"use the complex exponential series to express...

May304 05:13 PM
fourier jr

3 
2,749 
Hello, I have a simple question.
When reducing a lambda expression what happens in this case:
(L x.y) (L z.z) (L...

May304 06:16 PM
master_coda

2 
2,813 
Any references would be appreciated. Thank you.

May304 10:16 PM
Stevo

2 
1,656 
I am not sure where to start with this problem....Any help I receive would be greatly appreciated:
Compute the...

May404 06:37 AM
HallsofIvy

1 
4,165 
If the surface area equation for a box is given as 7200 = 6x^2 + 4xy where x represents the length and width of the...

May404 02:46 PM
Caldus

7 
1,141 
Hi,
I've to cope a little problem concerning general nonlinear regression. To cut a long story short: I've got a...

May504 07:17 AM
Dr Transport

1 
5,887 
Hello, can anyone help me out here?
If you have a function f(z) in U, and b in U, such that b is an isolated...

May504 09:06 PM
HallsofIvy

1 
1,615 
I need to find the derivative of:
(x^26x+9)(2x^2x+1)
what i did:
(2x6)(2x^2x+1)+(4x1)(x^26x+9)...

May604 11:46 AM
fourier jr

4 
893 
Someone has to help me here.
1. \int \frac{dx}{\sqrt{1  x^2}} = sin^1 x + C
So the derivative of sin^1x is...

May604 03:36 PM
Njorl

2 
14,549 
I am asked to find the equation of the tanget line to the curve at the givien points. (y y1 = m(x1x))
The point...

May604 07:01 PM
cookiemonster

1 
4,460 
Heya!
I was hoping someone could clear this up for me: how would a line integral be represted graphically? I've...

May604 07:12 PM
matt grime

5 
892 
Hello, I am in grade 12 taking math31 which is pretty much a college course. Im not doing that great in it at the...

May604 10:25 PM
Ebolamonk3y

3 
944 
On the final exam that I just took, the last problem went like this:
A spotlight is shining on a building. It is 36...

May804 11:21 AM
Gokul43201

9 
4,482 
Ok i have an easy function:
1/(5x^7sqrt(x)) Now i am asked to derive this. What would be the best method. I thought...

May804 11:38 AM
Gokul43201

3 
1,270 
We went over this breifly in class and i'm confused on it. Were doing first order only and this is the problem: z =...

May804 09:36 PM
fourier jr

5 
1,206 
Anyone know how to find a sum of a function using the poisson summation formula and the fourier transform. Thanks!...

May1204 12:55 AM
ReyChiquito

1 
1,797 
In the movie A Beautiful Mind, Prof. Nash introduces his class at MIT to a problem (below) on the chalkboard and...

May1204 12:43 PM
kuengb

1 
10,513 
Alright, so I've got this volume problem and it seemed really easy, only my answer is off, if only by a little bit....

May1404 09:57 AM
matt grime

8 
933 
Find a nonzero polynomial f(w, x, y, z) in the four indeterminates w, x, y, and z of minimum degree such that...

May1504 01:37 AM
matt grime

1 
2,347 
Hello folks! I'd be happy for any help you could give me. Thanks! :)
First though I'd like to make clear that I...

May1704 01:32 AM
cookiemonster

20 
7,503 
Hi, ive been trying to solve this integral for a while now, but im still making no headway, any help would be much...

May1704 04:38 PM
Zurtex

20 
2,074 
Is there a simple neat process to compute derivates for factorials beyond the simple ones...

May1804 12:13 AM
franznietzsche

3 
3,305 
Can you tell me what the following formula will be after it gets expanded ?
(1+x+x^2+.......+x^n^^2+x^n^^1)^2 = ?
...

May1904 07:45 AM
Pattielli

2 
2,830 
If I intergrate 2(pi)r I get (pi)r^2
If I integrate that I get 1/3 (pi)r^3, which is close to the volume of a...

May1904 04:37 PM
matt grime

6 
1,332 