CUET Preparation Today
CUET
-- Mathematics - Section A
Matrices
If A is a square matrix of order 4 and |A| = 4, then |2A| will be:
8
64
16
4
The correct answer is Option (2) - 64
$|A| = 4$
so $|2A|$
$=2^4|A|=2^4×4$
$=64$
