数列求和是数列的两大问题之一,是高考命题的重点和热点.常常需将这些试题中的通项进行裂项,才容易求其和.下面笔者以近两年的高考试题为例,谈谈如何用裂项法求数列的和. The series summation is one of the two major problems of the series, and it is the focus and hot spot of the college entrance examination proposition. It is often necessary to split the general terms of these questions to make it easier to sum them. The following author takes the high exam questions of the past two years as an example. Talk about how to use the split item method to sum the numbers.