Help on system of differential equations? http://dl.dropbox.com/u/17638088/desystem1.pdf Please check if there's anything wrong in my solution.

Question

dumbcow · Answer

unable to open file, sorry

anonymous · Answer

i'm looking at it, give me a sec

anonymous · Answer

@dumbcow: oh, sorry, I wonder if the problem is the Adobe Reader plug-in in your browser? it works well in mine..

@MathMind: thanks.

anonymous · Answer

do you know what's the right answer?

anonymous · Answer

Here's WolframAlpha's: http://www.wolframalpha.com/input/?i=x%27+%2B+y%27+%2B+2y+%3D+0%2C+x%27+-+3x+-+2y+%3D+0 I hope I typed the problem correctly in there though haha.

anonymous · Answer

wtf.. hahah, weird answer

anonymous · Answer

I know right.. haha. Maple, anyone? Lol.

dumbcow · Answer

sorry its a bit late but i worked out what you entered into wolfram
my solution:
$$x(t) = -2c _{1}e ^{2t} - c _{2}e ^{-3t}$$
$$y(t)= c _{1}e ^{2t} + 3c _{2}e ^{-3t}$$
it looks like it could be the same as wolframs answer but you would have to have initial conditions to check, their constants are different
hope this helps

anonymous · Answer

haha thanks, i think you got the right answer. it also appeared on my final, only thing is that my final was multiple choice, and your answer looks like the right answer there haha. :D

dumbcow · Answer

:)