CUET Preparation Today
Given that $A$ is a square matrix of order $3 \times 3$ and $|A| = -4$. Find $|\text{adj } A|$. |
-16 16 64 -64 |
16 |
The correct answer is Option (2) → 16 ## $|\text{adj } A| = |A|^{n-1}$ where $n$ is the order of matrix $A$. $|\text{adj } A| = (-4)^{3-1} = (-4)^2 = 16$ |
