Ex 3.4, 18 - Matrices A and B will be inverse only if - Ex 3.4

  1. Chapter 3 Class 12 Matrices
  2. Serial order wise

Transcript

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

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.