If A and B are square matrices ofthe same order such that (A + B)(A - B) = A2 - B2, then (ABA-1)2 is equal to
B2
I
A2B2
A2
On the set of integers Z, define f : Z Z as f(n) = , then 'f' is
injective but not surjective
neither injective nor surjective
surjective but not injective
bijective
If f(x) = , then for any x 0, f(x) is equal to
1 - x2
1 + x2
B.