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12的负三次方为什么等于8
更新时间: 2020-07-07 00:00:00  

二分之一的负三次方等于二分之一三次方的倒数。二分之一的三次方等于八分之一,八分之一的倒数是8。

关键词: 次方 为什么 等于

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