在①
,②
,③
这三个条件中任选一个,补充在下面问题(2)中,若实数
存在,求
的取值范围;若不存在,说明理由.
已知集合
,集合
.
(1)当
时,求
;
(2)当______时,求实数
的取值范围.注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05d2be27e8f53e4de3071846dffb41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca18647bd19f05c6ba7ecfa9921c4280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3092fca7a675b1bc7ebfa91cc20353f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed9fda65e8dbf9aee39e1fe129e4efaa.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)当______时,求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2020-10-23 12:23:05
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