要使二次根式
有意义,则x的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d166e2e530181a92f2bad059262340.png)
更新时间:2023-06-01 16:17:03
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【推荐1】已知
是不为零的常数,若
的解集为
,则下列推断:①
;②
;③
;④关于
的二元一次方程
,当
取一个不为零的常数时,方程总有一个解为
,其中推断正确的序号有______ .
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【推荐2】若方程组
的解x,y满足
,则m的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915ed5dce757977351181b4ca4c3600b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a16d3f95ea99985bd9b52d4721845.png)
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