利用递推关系求数列的通项公式是数列中比较重要的内容,在历届高考试题中能找到很多有关的例子,大部分考生也知道有关的通法有哪些,但在运用方面还有一些不如意之处.下面根据2006年高考中的一些压轴题,介绍2种通法,并展示如何应用实例.例1(2006年福建第22题)已知数列{an}满足a1 Using the recurrence relation to find the general formula of the series is a more important content of the series. Many examples can be found in the previous high exam questions. Most of the candidates also know what the general methods are, but there are some unsatisfactory aspects in their use. In the following, according to some of the final topics in the 2006 college entrance examination, two kinds of general methods are introduced, and examples of how to use them are shown. Example 1 (Fujian 22nd issue, 2006) Known series {an} satisfies a1