Find the inverse of
by reducing the augmented matrix [A|I] using row operations.
The Attempt at a Solution
I just can't seem to get this one out, it's the last in a series of 9 similar questions and the first I am to have a hard time with.
First few attempts involved operations like:
R1 <- R1 x 1/4
R3 <- R3 + R2
R4 <- R4 + R1
R1 <- R1 - 2R4
But I don't seem to be getting any closer to a solution with the operations that i am trying.
Any help, even just a pointer as to what row operations to start off with, would be gratefully appreciated.