If A is a non-singular matrix of order 3 × 3, then $adj\, (adj\, A)$ is equal to
Answer & explanation
Correct answer: option 1
If A is a non-singular matrix of order n, then $adj\, (adj\, A) =| A|^{n-2} A$
Here, $n = 3$.
$∴ adj\, (adj\, A) =|A| A$
If A is a non-singular matrix of order 3 × 3, then $adj\, (adj\, A)$ is equal to
Correct answer: option 1
If A is a non-singular matrix of order n, then $adj\, (adj\, A) =| A|^{n-2} A$
Here, $n = 3$.
$∴ adj\, (adj\, A) =|A| A$