# Question: given the encoding matrix a 2 0 1 2 1...

###### Question details

Given the encoding matrix

A=

2 0 1

2 1 −1

3 1 −1

compute

A−1

using the Gauss-Jordan technique .You must show your work. You must check your work by multiplying the inverse by the original matrix. You should get the3 × 3

identity matrix as the result. If you are unable to get the correct inverse, use

wolfram|alpha to obtain it.