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二次根式有意义条件
更新时间: 2021-01-03 17:26:44  

1、判断一个二次根式是否为最简二次根式主要方法是根据最简二次根式的定义进行,或直观地观察被开方数的每一个因数(或因式)的指数都小于根指数2,且被开方数中不含有分母,被开方数是多项式时要先因式分解后再观察。

2、二次根式的被开方数为非负数,当a≥0时,二次根式有意义,当a

关键词: 根式 意义 条件

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