CUET Preparation Today
If A is square matrix of order3 with |A|= 3, then |4 adj A| is equal to : |
432 476 676 576 |
576 |
The correct answer is Option (4) → 576 $|A|=3$ [Given] $⇒|Adj\,A|=|A|^{n-1}$ [n = order] $=|3|^{3-1}=9$ Now, $|4\,Adj\,A|=(4)^3|Adj\,A|$ $=64×9=576$ |
