Practicing Success
Practicing Success
CUET Preparation Today
If A is a square matrix of order 3 and $|A|= -2$ and , $|-2A^{-1}|$ is : |
-4 4 8 2 |
4 |
The correct answer is Option (2) → 4 $|A|= -2$ so $|-2A^{-1}|=-2|A^{-1}|$ as $|A|=|A^{-1}|⇒|-2A^{-1}|=4$ |
