A is 3 × 3 matrix and | A | = 4 then | a d j (a d j A) | = 4 k. Then k is

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Solution

Q.
A is $3 \times 3$ matrix and $| A |$ $= 4$ then $| a d j (a d j A) |$ $= 4^{k}$ . Then $k$ is _____

Ans.
(4)

$| adj (adj A) |$ $=$ $| A |^{{(n - 1)}^{2}}$

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