Suppose you want to prove that a ring homomorphism :R→S preserves nth powers of the ring, that is f(x^) = f(x)", by mathematical induction. The initial case is n=1,f(x)=f(x). The induction assumption is f(xk) = f(x)k What could be a valid first two steps in the induction step which lead to a valid complete proof and form a necessary part of the proof? The goal of the induction step is to prove that f (x*+1) = f(x)k+1 not part of the actual proof. You can use the fact that for all positive integers n,for all z in the ring zn+1 = z"z, and the fact forall z,w in R, f(zw)=f(z)f(w). @ f(xk+1)=f(x*+1) A = f(x)k+1 f(xk+1) = f(x*x) В

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