CUET · MATHS · PYQ PAPER 2023
If \(A\) is a square matrix of order 3 such that \(|A|=2\), then \(\operatorname{adj}(\operatorname{adj} A)\) is :
- A 0
- B 2
- C 16
- D -16
Answer & Solution
Correct Answer
(C) 16
Step-by-step Solution
Detailed explanation
\(\left|\operatorname{adj}(\operatorname{adj} A)\right| = |A|^{(n-1)^2}\) \(\left|\operatorname{adj}(\operatorname{adj} A)\right| = 2^{(3-1)^2}\) \(\left|\operatorname{adj}(\operatorname{adj} A)\right| = 2^{2^2}\) \(\left|\operatorname{adj}(\operatorname{adj} A)\right| = 2^4\)…
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