# Linear algebra question

Linear algebra question....

Hello again!

Ok...so if I let A =

[0 1 0 ]
[1 1 -2]
[2 3 -3]

How would I find A^-1? Is that the notation for inverse?

Also, could I express A^-1 as a product of at most five elementary matrices? What does this mean exactly?

Thanks!!

lurflurf
Homework Helper

Elementary matrices are the representation of elementary operations. So see if you can get from the identity to A with five or fewer operations. Hint may help to instead see if you can go from A to I in five steps.

Elementary operations are
-interchange two rows
-multiply a row by a nonzero value
-add a multiple of a row to another

HallsofIvy