CUET · MATHS · PYQ PAPER 2023
If A is a square matrix of order 3 and |A| = 5, then | adj A| is:
- A 5
- B 25
- C 125
- D 625
Answer & Solution
Correct Answer
(B) 25
Step-by-step Solution
Detailed explanation
\( |\text{adj A}| = |A|^{n-1} \) \( |\text{adj A}| = 5^{3-1} \) \( |\text{adj A}| = 5^2 \) \( |\text{adj A}| = 25 \)
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