求数列的通项公式是高中数学教学的重点和难点,其中求递推数列的通项公式是近年高考考查的热点之一.解决此类问题的一般方法是根据数列递推关系的结构特征,通过某种变换,使之构造、转化为新的数列来求数列的通项公式.以下结合历年高考题进行 The general formula for solving the sequence of numbers is one of the most important and difficult points in high school mathematics teaching. One of the hottest points in the recent college entrance examination is to find the general formulas of the recursive series. The general method to solve such problems is based on the structural characteristics of sequence recursion relations, Through some transformation, so that the structure, into a new series to calculate the general formula of the number of columns. The following combination of years of college entrance examination questions