QUESTION 18 Let S(n) = 2n - 1. Evaluate by induction hypothesis : a) S(k) b) S(k+1) O a) S(k) = 2k - 1 b) S(k + 1) = 2k + 1 O a) s(k) - 2k-1 b) S(k + 1) = 2n + 1 O None of the mentioned a) S(k) = 2k + 1 b) S(k+ 1) = 2k + 1