数列求和是数学学习的重难点,也是高考的必考点。除等差、等比数列有公式外,大部分的数列求和都要进行变形,应用技巧来解。下面将介绍六种数列求和方法。(1)公式法。这类题比较好拿分,只要学生把数列的类型分析清楚,套用公式即可。(2)错位相减法。首先求出数列的通项,然后分析数列通项的构成,此方法主要适用于求数列{a_n· Summation of numbers is the heavy difficulty of maths learning, but also the test of the college entrance examination. In addition to the arithmetic and geometric equivalent equations, most of the summation of the series must be deformed, and the applied technique should be used to solve the problem. The following describes the six series summation method. (1) formula method. These questions are better to take points, as long as the type of sequence analysis of the students clearly, the formula can be applied. (2) Displacement subtraction method. First find the general term of the series, and then analyze the composition of the general term, this method is mainly applied to find the number of columns {a_n ·