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Let A = … and a_ij be any element of matrix A, i, j ∈ {1,2,3}, then which of the following are TRUE? (A) Minor of a_23 = 16 (B) Minor of a_23 = -8…

CUET UG 2025 — Mathematics Algebra

2025mcqmedium

Let A=[2−34015−423]A = \begin{bmatrix} 2 & -3 & 4 \\ 0 & 1 & 5 \\ -4 & 2 & 3 \end{bmatrix}A=​20−4​−312​453​​ and aija_{ij}aij​ be any element of matrix A, i, j ∈ {1,2,3}, then which of the following are TRUE?

(A) Minor of a23=16a_{23} = 16a23​=16

(B) Minor of a23=−8a_{23} = -8a23​=−8

(C) Cofactor of a23=−16a_{23} = -16a23​=−16

(D) Cofactor of a23=8a_{23} = 8a23​=8

(E) Cofactor of a13=4a_{13} = 4a13​=4

Choose the correct answer from the options given below:

Official previous-year question

Held on 13 May 2025 · Verified 13 Jul 2026.

Options

  1. A

    (A) and (C) only

  2. B

    (B) and (C) only

  3. C

    (B), (D) and (E) only

  4. D

    (A), (C) and (E) only

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