1. The problem statement, all variables and given/known data What is the inverse of matrix A? A= (1) (2) (1) (2) (-1) (2) (1) (2) (1) 2. Relevant equations 3. The attempt at a solution The determinant works out to be 0 The inverse is 1/determinant x adj(A) Therefore the inverse is 1/0 x adj(A) So is the answer to, what is the inverse, simply that it is undefined?