Question

If $A$ is a square matrix of order $n\times n$ , then $adj(adjA)$ is equal to

• A. $|A{|}^{n}A$
• B. $|A{|}^{n-1}A$
• C. $|A{|}^{n-2}A$
• D. $|A{|}^{n-3}A$

Answer 1

Answer: (C)

By the property of adjoint of a matrix
$adj\left(adjA\right)={\left|A\right|}^{n-2}A$