Use mathematical induction to prove the formula for every positive integer n. (1 + 1) (1 + 1)1 + ) (1 + 1) = 1 + 1 1 + ( + 1 n 3 = Find S1 when n = 1. S1 = Assume that Sk- (1 + 1) (1 + 1)(1 + ) - (1+)