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CUET · MATHS · PYQ PAPER 2025

If \(A=\left[\begin{array}{ccc}2 & 1 & 3 \\ 4 & -3 & 5\end{array}\right]\) and \(B=\left[\begin{array}{cc}-2 & 3 \\ 4 & -5 \\ 1 & 2\end{array}\right]\), then which of the following statements are TRUE?
(A) AB is defined
(B) AB and BA both are defined and \(A B=I\), where I is an identity matrix of order 2
(C) BA is defined
(D) AB and BA both are defined and \(A B=B A\)
Choose the text correct answer from the options given below :

  1. A (A), (B) and (C) only
  2. B (B), (C) and (D) only
  3. C (A) and (C) only
  4. D (A), (C) and (D) only
Verified Solution

Answer & Solution

Correct Answer

(C) (A) and (C) only

Step-by-step Solution

Detailed explanation

Matrix A is \(2 \times 3\). Matrix B is \(3 \times 2\). For AB: Columns of A (3) = Rows of B (3). AB is defined. (A) is TRUE. For BA: Columns of B (2) = Rows of A (2). BA is defined. (C) is TRUE.…