- #1
Melawrghk
- 145
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Homework Statement
So I'm doing a systems of DEs question with undetermined coefficients. After comparing coefficients, I have this:
a+b=Ab+(1,0)T
where a&b are vectors (2D) and A is the coefficient matrix:
[2 -1]
[3 -2]
I know that 'a' is (1,1)T. I need to find b.
I tried rearranging it, but I don't know if that's right.
(1,1)-(1,0)=Ab-b
(0,1)=(A-1)b
So I found A-I:
[1 -1]
[3 -3]
I was going to invert it and multiply by (0,1), but it's not invertible. What do I do?