CUET Preparation Today
CUET
-- Mathematics - Section A
Matrices
A is a square matrix of order 3 such that |A| = 13. The value of |-3A| is _____________.
-39
-351
117
169
The correct answer is Option (2) → -351
$|A| = 13$
$|-3A|=(-3)^3|A|$
$=-27×13$
$=-351$
