# Ex 3.4, 18 (MCQ) - Chapter 3 Class 12 Matrices (Term 1)

Last updated at Aug. 9, 2021 by Teachoo

Ex 3.4

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Ex 3.4, 18 (MCQ) Deleted for CBSE Board 2022 Exams You are here

Chapter 3 Class 12 Matrices (Term 1)

Serial order wise

Last updated at Aug. 9, 2021 by Teachoo

Ex3.4, 18 Matrices A and B will be inverse of each other only if A. AB = BA B. AB = BA = O C. AB = O, BA = I D. AB = BA = I Given that A & B will be inverse of each other i.e. A-1 = B & B-1 = A From (1) & (2) AB = BA = I So, the correct answer is D