Practicing Success
Practicing Success
CUET Preparation Today
If A is a square matrix such that $A^2=A,$ then |A| equals |
0 or 2 0 or 1 0 or -1 -1 or -2 |
0 or 1 |
The correct answer is Option (2) → 0 or 1 $A^2=A$ so $|AA|=|A|$ $|A|^2=|A|$ $|A|=0,1$ |
