CUET Preparation Today
CUET
-- Applied Mathematics - Section B2
Algebra
A is a matrix of order 3 × 3 such that |A| = 4, then the value of |2A| is
32
16
8
4
The correct answer is Option (1) → 32
$|A|=4$
$⇒|2A|_{3×3}=2^3|A|=8|A|$
$=8×4$ $[|kA|_n=k^n|A|]$
$=32$
