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Answers for “什么是归纳假设?”

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The inductive hypothesis is the temporary assumption made during the inductive step that the proposition P(k)P(k) is true for an arbitrary integer k. It is used as a premise to derive the truth of P(k+1)P(k+1).

Conditions: Used within the proof of the inductive step.; Assumes P(k)P(k) is true for a fixed arbitrary k.; Required to prove P(k+1)P(k+1).

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The two conditions are: 1) The base case, where the propositional statement P(1)P(1) is verified as true for the initial value n=1n=1. 2) The inductive step, where it is proven that if the statement is true for an arbitrary integer k(P(k))k (P(k)), then it must also be true for k+1(P(k+1))k+1 (P(k+1)).

Conditions: The statement is a proposition P(n)P(n) indexed by natural numbers.; The base case is typically checked at n=1n=1.; The inductive step assumes P(k)P(k) is true to prove P(k+1)P(k+1).