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根号49的值是多少为什么
更新时间： 2020-10-04 00:00:00  

根号49的值是7，开平方的值必须是非负数，49的平方根是正负7，此题是开方，而不是求平方根，所以根号49的值是7、

关键词： 根号 多少 为什么

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