Question

If A is a matrix of order 3 and |A| = 8, then |adj A| =
(a) 1
(b) 2
(c) 2³
(d) 2⁶

Answer 1

(d) $2^6$

$$\begin{gathered} \left|adjA\right|={\left|A\right|}^{n-1} \\ =8^2 \\ =2^6 \end{gathered}$$