Ex 4.5, 5 - Find inverse of each of matrices - Class 12 NCERT - Ex 4.5

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  1. Chapter 4 Class 12 Determinants
  2. Serial order wise
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Ex 4.5, 5 Find the inverse of each of the matrices (if it exists) 2 2 4 3 Let A = 2 2 4 3 We know that A-1 = 1 |A| adj A exists when |A| 0 |A| = 2 2 4 3 = 2 3 4 ( 2) = 6 + 8 = 14 Since |A| 0, A 1 exists Calculating adj A A = 2 2 4 3 adj(A) = 2 2 4 3 = 3 2 4 2 Calculating A 1 A-1 = 1 |A| adj A =

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.