For the matrix A = 
1
1
1
1
2
3
2
1
−3
−








Show that  A3– 6A2 + 5A + 11 I = O Hence, find A–1 16 If A = 
2
1
1
1
2
1
1
1
2
−
−
−
−








Verify that A3 – 6A2 + 9A – 4I = O and hence find A–1
17