Question

if A. is an invertible square
Matrix then
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Answer 1

Step-by-step explanation:

Definition A square matrix A is invertible (or nonsingular) if ∃ matrix B such that AB = I and BA = I. (We say B is an inverse of A.) ... If A is invertible, then its inverse is unique. Remark When A is invertible, we denote its inverse as A−1.