For any square matrix of order

MATHEMATICS · Single correct · CBSE · Mathematics · Matrices · Matrices

Problem

For any square matrix

A

of order

n

, which one of the following statements is always true? (a)

A\,\text{adj}\,A = I_n

(b)

\text{adj}\,A = |A|\,A^{-1}

(c)

A\,\text{adj}\,A = |A|\,I_n

(d)

A\,\text{adj}\,A = |A|\,A