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4的几次方等于2
更新时间: 2020-09-20 00:00:00  

4的二分之一次方等于2,即4开平方等于2。开方,指求一个数的方根的运算,为乘方的逆运算,在中国古代也指求二次及高次方程包括二项方程的正根。

关键词: 次方 等于

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