In problem use Theorem II.3 to find A^-1 for the given matrix or show that no inverse exists.

Theorem II.3

If an n × n matrix A can be transformed into the n × n identity I by a sequence of elementary row operations, then A is nonsingular. The same sequence of operations that transforms A into the identity I will also transform I into A^-1.

Transcribed Image Text:

-1 3 0 A = 1 -2 1 1 2/