- #1
DaxInvader
Homework Statement
Solve the following differential equation.
y'= {{2,-1},{3,-2}}y + {{1},{-1}}(e)[itex]^{x}[/itex]
If it's not clear, I made an image for it.
http://i.imgur.com/lypTxqf.jpg
Homework Equations
[itex]y{g}[/itex] = [itex]y{h}[/itex] + [itex]y{p}[/itex]
The Attempt at a Solution
So basically, I am looking for a homogeneous solution and a particular solution.
I started by looking at the eigen values and eigen vectors.
I found [itex]\lambda[/itex]1 = 1 and [itex]\lambda[/itex]2 = -1
And the vectors that go with them : [itex]\stackrel{\rightarrow}{V1}[/itex] = (1, 1) and [itex]\stackrel{\rightarrow}{V2}[/itex] = (1,3). with give me the homogeneous solution
[itex]y{h}[/itex] = C1(e)[itex]^{x}[/itex](1, 1) + C2(e)[itex]^{-x}[/itex](1, 3)
But I have a hard time looking for a particular solution..
I supposed that Yp was something like [itex]\stackrel{\rightarrow}{a}[/itex] * x * (e)[itex]^{x}[/itex] + [itex]\stackrel{\rightarrow}{b}[/itex] * (e)[itex]^{x}[/itex] and... I'm having a lot of trouble from there.. I found Y'p and. it start to get pretty complicated.. is there an easier way? I'm I doing this right?
thanks!
Dario