Recent content by robbondo

I think most of the people on this forum are very helpful if you are able to ask a specific question... Are you asking how to make an m file that will multiply two matrices? If so, it is a reatively long process. Is there a specific part you are having difficulties with?

yeah... So I figured out that i can make the vectors and the constants into matrices and then use the inverse to solve for C1, etc. but it's not working for some reason. I'm still working on it.

Homework Statement P = c1*V1 + c2*V2 Where P, V1, and V2, are equal sized matrices Homework Equations The Attempt at a Solution So what this problem amounts to is me trying to find the steady state of Markov matrix. So I solved for the eigen vectors, and as is my...

by making a 1 you are making the matrix cingular because the row vectors are now linearlly dependent. I think the method you're using should work also... You would get a-1 = 0...

I'm beginning to think that my teacher made an error in writing this problem. It appears to be unsolvable through all my efforts.

I'm still having trouble figuring out the limits of integration on this one. Every way that I do it I keep having to take the integral of x*e^(x^2+x) which as far as I know isn't possible to do. I tried plugging it into a numerical solver and it gave me an exact answer that looked like...

Ok So know when I try to do the integration am I correct to use the limits of integration of that z goes from 0 to 1 and theta goes from 0 to 2pi and then r goes from root z to z? Also I tried using z from r to r^2 r from 0 to 1 and theta from 0 to 2pi, and they are all giving me strange...

Homework Statement Find the triple integrals \oint\oint\oint_{W}{f(x,y,z)dV: e^{x^{2}+y^{2}+z}, (x^{2}+y^{2}) \leq z \leq {(x^{2}+y^{2}})^{1/2}Homework EquationsThe Attempt at a Solution So I know I need to probably switch to cylindrical coordinates. But I'm getting confused about the limits...

I guess I'm still a little dissatisfied with the reasoning as to why the limits of integration of x go from 1 to root 2. I asked my TA this afternoon and she assured me that I should use the integral from -root two to root two for x. Now though If I don't use symmetry I'm going to have to...

I thought that because the limits of integration for y were from (1-x^2)^1/2 to (2-x^2)^1/2 would prevent that from happening...

Sorry I meant 1 <= x^2+y^2 <= 2 and y <= 0. So even if I switch to different coordinate system the main conceptual issue I'm having is why you take the integral of x from square root of two to 1 instead of square root of two to 0.

Homework Statement Let D be the region given as the set of (x,y) where 1 <! x^2+y^2 <! 2 and y !<0. Is D an elementary region? Evaluate \int\int_{D} f(x,y) dA where f(x,y) = 1+xy. Homework Equations The Attempt at a Solution So I understand that this is two concentric circles(an...

I guess that makes sense since it's the same matrix. My sucky book doesn't have anything under exponentiation in the index but it may be in there, just not in the beginning sections were in right now. Thanks for the help, I finished the problem.

I don't know what the deff. of exponentiation is... Exponentiation for matrix's or in general? This is the very beginning of my lin alg class...

Oops I screwed up on the original posting... so the matrix is 0 0 -1 0 2 0 2 0 0 And I don't really see any repetition at all which was what I was hoping would happen... For A squared I got -2 0 0 0 4 0 0 0 -2 Then for A^4 I get 4 0 0 0 16 0 0 0 4 So...