Question

If A=[3−5−42], then find A2−5A−14I.Hence,obtain A3.

Answer 1

Ex 4.5, 15 For the matrix A = 1 1 1 1 2 3 2 1 3 show that A3 6A2 + 5A + 11I = O. Hence, find A 1. Calculating A2 A2 = A.A = 1 1 ...