数学归纳法的第一步是:证明当n取第一个值n0时结论正确.一般地对这一步的理解,仅仅局限在“验证”n=n0时结论正确,从而本命题有成立的基础,往往忽视了这一步的导向功能——即它在证明命题在n=k+1的正确性时,所用方法及证明思路上的提示作用. The first step of mathematical induction is to prove that the conclusion is correct when n takes the first value n0. Generally speaking, the understanding of this step is limited to the fact that the conclusion is correct when “verification” n=n0, and thus the foundation of this proposition has been established. , often overlooked the guiding function of this step - that is, it proves the correctness of the proposition in the n = k + 1, the method used and the clues to prove the ideas.