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时间复杂度

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杨烨
2021-12-13 13:25:27 +08:00
parent 79388c1470
commit 83e3cb1a4e
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数据结构/时间复杂度/常用数列前n项和.md
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@@ -1,8 +1,7 @@
# 求解中常用数列的前n项和
### 1. n<sup>2</sup>
$$
```
n(n+1)(2n+1)/6
$$
```