数列问题,特别是递推数列问题历来是高考的重点内容之一,并且有逐渐升温的趋势。此类题型新颖灵活,精巧别致,它明显侧重逻辑推理和数学方法的考查,一般具有较强的综合性。同时,它的难度又有很大的可变性。如果能找到一种简明有效的方法,将会使问题变得非常简单。本文就一类递推 The series of questions, especially the recursive series of questions has always been one of the focus of the college entrance examination, and there is a gradual warming trend. This kind of question is novel and flexible, exquisite and unique, it is obviously focused on logical reasoning and mathematical methods of examination, generally has a strong comprehensive. At the same time, its difficulty has great variability. If you can find a concise and effective method, it will make the problem very simple. This article is about a kind of recursion