1. Chapter 3 Class 12 Matrices
  2. Serial order wise
  3. Ex 3.4

Ex 3.4, 18

Last updated at Dec. 8, 2016 by

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
    3. Ex 3.4
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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

Chapter 3 Class 12 Matrices
Serial order wise

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