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1 . 已知集合
,
,
.
(1)求
;
(2)若“
”是“
”的必要不充分条件,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f8b74eda1ef0812b7c6c2f17bc137c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff3d2c47bf6ad1fa5370ce801df3cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbf2806672ce6ee02d3e05c8da6931e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3eb5935678e432e6f1f3180bfdb3175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a479511a50da604b2fc7398617db8387.png)
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2018-06-30更新
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4卷引用:山东省济南市章丘区章丘市第四中学2019-2020学年高二上学期12月月考数学试题