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教学归纳法是证明与自然数有关问题的常用方法.这一证法分两部分,一是验证,二是论证.数学归纳法在证题过程中要确保四个成立, 即验证成立,假设成立,递推成立和结论成立, 而n=(?)+1的论证是这一证法的核心部分,也是难点所在.现从各地高考模拟卷中,选几道典型试题讨论在n=(?)+1时容易搁浅的解决方法.
Teaching induction is a common method to prove the problems related to natural numbers. This method of verification is divided into two parts, one is verification and the other is argumentation. Mathematical induction should ensure that the four are established in the process of the certification process, that is, verification is established and the hypothesis is established. The recurrence is established and the conclusion is established, and the argument of n=(?)+1 is the core part of this proof, which is also the difficulty. Now, from the simulation exams of the college entrance examinations, we will select several typical questions to discuss at n=(?) +1 is easy to strand solution.