If A is a square matrix of order $3×3$ such that $|A|=4, $ then $|-3A|$ is equal to :
Answer & explanation
Correct answer: option 3
The correct answer is option (3) → -108
$|A|=4$
so $|-3A|=(-3)^3|A|$
$=-27×4$
$=-108$
If A is a square matrix of order $3×3$ such that $|A|=4, $ then $|-3A|$ is equal to :
Correct answer: option 3
The correct answer is option (3) → -108
$|A|=4$
so $|-3A|=(-3)^3|A|$
$=-27×4$
$=-108$