数列是新课程必修五第二章内容,是历年高考的高频考点.数列的通项公式是研究数列性质,进行数列运算的主要依据,所以给定数列的递推公式求通项公式,是数列常考常新的内容之一.从近几年高考考查的模式,一般有以下几种类型:1.递推公式为 Series is the compulsory curriculum of the fifth chapter of the second chapter, is the high frequency test points over the years college entrance examination series of formulas is to study the nature of the sequence, the main basis for the operation of the series, so a given sequence of formulas The number of frequently used test often one of the new content from recent years, college entrance examination test mode, there are generally the following types: 1. Recursive formula