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What would be the hypothesis of mathematical induction for n(n + 1) < n! (where n ≥ 4) ?(a) It is assumed that at n = k, k(k + 1)! > k!(b) It is assumed that at n = k, k(k + 1)! < k!(c) It is assumed that at n = k, k(k + 1)! > (k + 1)!(d) It is assumed that at n = k, (k + 1)(k + 2)! < k!The question was posed to me in a national level competition.The query is from The Principle of Mathematical Induction topic in portion Principle of Mathematical Induction of Mathematics – Class 11

Answer»

Correct option is (b) It is assumed that at n = k, k(k + 1)! < k!

For explanation I would say: When we use the principle of MATHEMATICAL induction, we ASSUME that P(n) is TRUE for P(k) and prove that P(k + 1) is also true. Here P(k) is k(k + 1)! < k!



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