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根号21约等于多少
更新时间: 2020-09-27 00:00:00  

根号21约等于4、625。

根号是一个数学符号。根号是用来表示对一个数或一个代数式进行开方运算的符号。偶次根号下不能为负数,其运算结果也不为负。奇次根号下可以为负数。

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