Ex 4.5, 5 - Chapter 4 Class 12 Determinants
Last updated at May 29, 2018 by Teachoo
Transcript
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 =
Chapter 4 Class 12 Determinants
Serial order wise
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