CUET · MATHS · PYQ PAPER 2025
If \(A=\left[\begin{array}{ll}1 & 2 \\ 0 & 3\end{array}\right]\), then \(|A \operatorname{adj} A|\) is
- A 3
- B 6
- C 9
- D 12
Answer & Solution
Correct Answer
(C) 9
Step-by-step Solution
Detailed explanation
\(|A| = (1)(3) - (2)(0) = 3\) \(|A \operatorname{adj} A| = (|A|)^2\) \(= (3)^2 = 9\)
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