Section 7.8 Inverse of a Matrix

A={{-1,1,2},{3,-1,1},{-1,3,4}}

MatrixForm[A]

B=Inverse[A]

MatrixForm[A.B]

MatrixForm[B.A]

B={{1,2,5},{0,-1,2},{2,4,11}}

MatrixForm[B]

Det[B]

MatrixForm[Inverse[B]]

AB = A.B

Inverse[AB]

Inverse[B].Inverse[A]

Inverse[AB]==Inverse[B].Inverse[A]

Det[A] Det[B]

Det[AB]