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数列是高中数学的重要内容,又是学习高等数学的基础。在高考中占有重要的地位。数列求和是数列的重要内容之一,除了等差数列和等比数列有求和公式外,大部分数列的求和都需要一定的技巧。对于非等差、等比数列的求和,需观察通项的特点和规律,采用合适的方法将其化归为等差、等比数列。常见的求和方法有:公式法、分组转化法、裂项相消法、错位相减法、倒序相加法。
Counting is an important part of high school mathematics, but also the basis for learning advanced mathematics. In the college entrance examination occupies an important position. Summation of the sequence is one of the important contents of the sequence. Except for the sum of arithmetic sequences and the geometric sequence, the summation of most sequences requires certain skills. For the non-equal difference, the geometric ratio of the sum of the series, the need to observe the characteristics and laws of the general approach, using appropriate methods will be converted into equal-difference, geometric series. Common methods of summation are: formula method, group transformation method, fission cancellation method, dislocation subtraction method, reverse order addition method.