# 乘方 `a²` - 下面的a是底数 - ²是指数 算术叫做`乘方`, 计算结果叫做`幂` a² = a × a a³ = a × a × a a⁴ = a × a × a × a aⁿ = a × a .......n.......... × a --- ``` 4² = 16 -5² = -25 (只能管最近的数) (-5²) = 25 (管括号内的所有, -5 × -5 = 25 因为负负得正) ``` # 视频学习 - [https://www.bilibili.com/video/BV1px411V7YG](https://www.bilibili.com/video/BV1px411V7YG?from=search&seid=10387934992607871791)