名校
1 . 设集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f4898ca56ca1395c51909ae59f7ff3c.png)
(1)若
是
的必要条件,求实数
的取值范围;
(2)是否存在实数
,使
成立?若存在,求出实数
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f4898ca56ca1395c51909ae59f7ff3c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a61d65cabfd3b61951e6c1914f198fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-11-06更新
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292次组卷
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7卷引用:江苏省无锡市江阴市两校联考2023-2024学年高二下学期5月阶段性练习数学试题