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+# Example : 3 Chapter : 2.5 Pageno : 83
+# Inverse of product of matrices
+E<-matrix(c(1,-5,0,0,1,0,0,0,1),ncol=3)
+E1<-solve(E)
+F<-matrix(c(1,0,0,0,1,-4,0,0,1),ncol=3)
+F1<-solve(F)
+print(F1)
+FE<-F%*%E
+print(FE)
+print("Inverse of FE ")
+FE1<-solve(FE)
+print(FE1)
+print("Inverse of FE can also be E-1*F-1 ")
+print(E1%*%F1)