1 . 若集合
,
,
.
(1)求
;
(2)若
,求实数
的取值范围;
(3)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc4fc8c5d31916f716c5b8b44e23644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25358871fe728b2af44d911e06151d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36b6ea11971efe6c4b83b8c744016e3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323b7a0ca1495a6759045afb3255d33e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95321d0e551daa25104d32157249c23d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a693dd9988a6e003a239f3e37c1b3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2 . 已知集合
,
.
(1)当
时,求
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61241dcbf7b8710b40fac16129710bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca1d48db7a6d8ea8e2584efa411756a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2020-01-15更新
|
934次组卷
|
6卷引用:湖北省宜昌市宜都市第二中学2020-2021学年高一上学期9月月考数学试题
名校
3 . 已知
,
,若
,则a值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9c32728bf5ab124f31acea423ea314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04cfe384aed5ad7e16910640916c44d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
4 . 设集合
,集合
.
(1)若
,求实数
的值;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97927627b6890964c516f02dc34ed2f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f3244015dd2dede844f510bab48635.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc992c9e51d4b22232adf6bb5c8055a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-02-23更新
|
282次组卷
|
3卷引用:江苏省南通市海安高级中学2019-2020学年高一上学期期中数学试题(创新班)
名校
5 . 已知集合
为函数
的定义域,集合
.
(1)当
时,求
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f8c91926ffb8dddca8df93307e80e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e53b41903abccffacc36e02705ff582.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551fd8cd8ea61d794c13074ccd7d6c4e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-02-04更新
|
421次组卷
|
3卷引用:江西省赣县第三中学2020-2021学年高一12月月考数学试题
名校
6 . 已知集合
,
且
,则实数a的最大值是 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0673c352719c53bbbb101447ba368453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929bf414d9cea55b838a259e3999b3fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976b8c69985807dcc092cf33ccebac3a.png)
A.![]() | B.![]() | C.0 | D.1 |
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7 .
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09bbf6a1a434148846d36aa9e117301.png)
(1)若
,求
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b821ab912a2b856f127c643e376511ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09bbf6a1a434148846d36aa9e117301.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3516cead1976248defbf1ffe368170.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2019-12-25更新
|
179次组卷
|
2卷引用:宁夏石嘴山市平罗中学2019-2020学年高一上学期12月月考数学试题
8 . 已知集合
,
,若
,则实数
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53859a7e33a083b04c609781e90d0766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce323337a7729908e3025af819aaa1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543c1d097fd60d31c530ca9fac0273b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2019-12-25更新
|
370次组卷
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2卷引用:四川省内江市高中2019-2020学年高三上学期第一次模拟数学(文)试题
名校
9 . 已知集合
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
不可能 是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e82f14efbf69cffceb67f2714e56da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 若关于
的不等式
的解集为
,
的解集为
.
(1)试求
和
;
(2)是否存在实数
,使得
?若存在,求
的范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374d5551b9e7ca9734d0d13301d8001a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702d9438cd5abb9efc10b661d8732882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95321d0e551daa25104d32157249c23d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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