CUET · MATHS · PYQ PAPER 2025
Let A be a non-singular square matrix of order n, then
Match List - I with List - II
| List - I | List - II |
| (A) A (adj A) | (I) \(\frac{1}{|A|}\) |
| (B) |adj A| | (II) \(|A|^n\) |
| (C) \(\left|A^{-1}\right|\) | (III) \(|A| I\) |
| (D) \(|A(\operatorname{adj} A)|\) | (IV) \(|A|^{n-1}\) |
- A (A) - (I), (B) - (IV), (C) - (II), (D) - (III)
- B (А) - (I), (В) - (II), (C) - (III), (D) - (IV)
- C (A) - (IV), (B) - (III), (С) - (II), (D) - (I)
- D (А) - (III), (В) - (IV), (C) - (I), (D) - (II)
Answer & Solution
Correct Answer
(D) (А) - (III), (В) - (IV), (C) - (I), (D) - (II)
Step-by-step Solution
Detailed explanation
(A) \(A(\operatorname{adj} A) = |A| I \Rightarrow (\text{III})\) (B) \(|\operatorname{adj} A| = |A|^{n-1} \Rightarrow (\text{IV})\) (C) \(|A^{-1}| = \frac{1}{|A|} \Rightarrow (\text{I})\) (D) \(|A(\operatorname{adj} A)| = ||A|I| = |A|^n \Rightarrow (\text{II})\)
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