数列求和之三——拆项消去求和
- 时间:2020-04-06 17:43:36
- 分类:数学世界
- 阅读:148 次
继前面两讲《公式求和》、《分组求和》之后,这里廖老师将介绍第三种数列求和方法:拆项消去求和。所谓“拆项消去求和”,是指把算式中的某一项或若干项拆分为两个数的和或两个数的差,然后达到相互抵消的目的,从而简化计算的过程,寻求到更简便的计算方法。
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