- #1

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## Homework Statement

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.