今 An inverse matrix(逆矩阵) To a square matrix A, if a square matrix B exists and ab=bal. Then b is the inverse matrix of A(or a is the inverse matrix of B) 2021/2/22 cxt2021/2/22 12 cxt ❖ An inverse matrix （逆矩阵） To a square matrix A, if a square matrix B exists and AB=BA=I. Then B is the inverse matrix of A(or A is the inverse matrix of B)