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CUET · MATHS · PYQ PAPER 2025

Let A be a non-singular square matrix of order n, then
Match List - I with List - II
List - IList - 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) \(|A|^{n-1}\)
Choose the correct answer from the options given below:

  1. A (A) - (I), (B) - (IV), (C) - (II), (D) - (III)
  2. B (А) - (I), (В) - (II), (C) - (III), (D) - (IV)
  3. C (A) - (IV), (B) - (III), (С) - (II), (D) - (I)
  4. D (А) - (III), (В) - (IV), (C) - (I), (D) - (II)
Verified Solution

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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