CUET Preparation Today
CUET
-- Mathematics - Section B1
Matrices
If A is a square matrix of order 3 such that |A|=2, then |adj (adj A)| is :
0
2
16
-16
The correct answer is Option (3) → 16
$|A|=2$
order = 3
$|adj\,A|=|A|^{3-1}=2^2=4$
so $|adj\,adj\,A|=4^2=16$
