1 . 图中阴影部分所表示的集合正确的为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/d5ff286c-4a3e-4ff3-ad17-cf5f90373d54.png?resizew=467)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/d5ff286c-4a3e-4ff3-ad17-cf5f90373d54.png?resizew=467)
A.①是![]() | B.②是![]() | C.③是![]() | D.④是![]() |
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解题方法
2 . 已知集合
,
,
(1)若
,求
,
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4ea2a92fcc12877fee19cae1eab2cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7675c619b79a958105c0230fdb1395cd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81919684bc4047d376c7e57dc6c8f1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b646d630a4cef3b36bfa429ee296fc3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d0d79fd0efdb59c9ca65bfae4a0861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2021-11-29更新
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113次组卷
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2卷引用:福建省宁德市高中同心顺联盟校2021-2022学年高一上学期期中考试数学试题