方程组
的解集可表示为___________ (填序号).
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717ae5a0432a6fd6405d770c3ad64137.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80624733dc21df3daa3dbffc1071d76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3aca04a70841d3587c5b6b174e9366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693b334b6467d7f1037bb8960e057b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/590d3b03beff505f0f21358f30c380d1.png)
21-22高一·全国·课后作业 查看更多[2]
更新时间:2022-02-10 22:08:19
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【推荐2】集合
可用列举法表示为______ ,集合
可用列举法表示为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773316380e7e5558c653258ab7eaf854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d1dde61d0dd7d52405785f3703de4c.png)
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