Matrices

we have

A%20%3D%20%5Cbegin%7Bbmatrix%7D1%262%263%5C%5C%20-1%261%262%5C%5C%201%262%264%5Cend%7Bbmatrix%7D

Now,

%5Cleft(A%5E%7B2%7D%20-5A%5Cright)A%5E%7B-1%7D

%3D%20A%5E%7B2%7D%20%5Ccdot%20A%5E%7B-1%7D%20-%205A%20%5Ccdot%20A%5E%7B-1%7D%20%3D%20A%20-%205I

%3D%20%5Cbegin%7Bbmatrix%7D1%262%263%5C%5C%20-1%261%262%5C%5C%201%262%264%5Cend%7Bbmatrix%7D-%5Cbegin%7Bbmatrix%7D5%260%260%5C%5C%200%265%260%5C%5C%200%260%265%5Cend%7Bbmatrix%7D

%3D%20%5Cbegin%7Bbmatrix%7D-4%262%263%5C%5C%20-1%26-4%262%5C%5C%201%262%26-1%5Cend%7Bbmatrix%7D

Chapter Questions
1 MCQs