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freeCodeCamp/guide/chinese/mathematics/arithmetic-series/index.md
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---
title: Arithmetic Series
localeTitle: 算术系列
---
## 算术系列
算术系列是算术序列中所有项的总和。
如果n是序列中术语的总数则1是序列中第一项的值 k是序列中最后一项的值序列的总和将等于
![算术级数方程](https://github.com/Zoonn123/resources/blob/master/arithmeticserieshacktoberfestedit.png)