解题方法
1 . 若
是不等式
成立的充分不必要条件,则实数
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd1211db79194ed9d35dc8a6c3898e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152bfe8e79090fbafefe17e44da6badd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
2 . 若
是实数,集合
,
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ff8caa2a96060eaeac2e4bd8bb4b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab79432b5b7e81975eea4eb2ec40e834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
A.充分不必要条件 | B.必要不充分条件 | C.充要条件 | D.既不充分也不必要条件 |
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3 . 已知函数
,
.
(1)若
恒成立,求m的取值范围;
(2)若当
时,
恒成立,求实数x的取值范围;
(3)当
时,若对任意
,总存在
,使
成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0b3552072dcba2ad39a0940cd98c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a10c9db07d5ae945f4ec317c5f0b35.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71366a875338a5acfcc9f19aa675d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd817c3a2501a5547b07fdb1f021920.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17641d15644d5fb2c79fd1016b21520f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0253c52fe1fb0d44484fabf93f772f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14480411727511a391e5c7740a2bc6fd.png)
您最近一年使用:0次
4 . 已知集合
,
.
(1)求
;
(2)若集合
,
,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dec7434f5aa28265fd5fffa4d33ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1343eb79399de37143051c723eff8b73.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551fd8cd8ea61d794c13074ccd7d6c4e.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762670fcb682470c7b931c11df8d2f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e968937d457d9e2237b401077ff224a.png)
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5 . 下列四个结论:①
;②
;③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f5e5688b5c7e514ee72597690a7676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411837b4b3078d05b43cb0439259a362.png)
;④
.其中正确结论的序号有几个( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba99c2e0223815eccbd77f4b528a345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf82d0306f6f5ce7b8aa3c8b4059e6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f5e5688b5c7e514ee72597690a7676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411837b4b3078d05b43cb0439259a362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a837165ca03f9e4ea8964979c95e3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c77009ae1d0ce744a1e1ac98e74c88f.png)
A.1个 | B.2个 |
C.3个 | D.4个 |
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名校
解题方法
6 . 已知集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfa8f446f35ba49e831c36f12768ec1.png)
(1)当
时,求出![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb651853e6b907bc03d78b0d2939d7cf.png)
;
(2)若
,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfa8f446f35ba49e831c36f12768ec1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb651853e6b907bc03d78b0d2939d7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8250496dff397b3e8778755a8fe5d31e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
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2021-11-17更新
|
445次组卷
|
5卷引用:河南省郑州市十校2021-2022学年高一上学期期中联考数学试题
名校
解题方法
7 . 已知函数
,
,若对任意
,总存在
,使得
,则实数a的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66062dbd4978a7bb2fb9b9aabb898af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db719f78be99ee3fac8c1cdb96e2eab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31395d2ed7dacaf20369a0eeabc2e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309a5945d32b015fe77dd33909b70a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
您最近一年使用:0次
2021-11-17更新
|
582次组卷
|
7卷引用:河南省郑州市十校2021-2022学年高一上学期期中联考数学试题
名校
8 . 设全集为
,集合
.
(1)求
;
(2)已知集合
,若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e68ea1f9f989669ec3f1438bd15e06.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a56eb864b1a684c36d58ac8f9e3ea24.png)
(2)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfada98e40a195f68b1ed752a386ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7893cdb324f5378417c1977ce17667a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2021-11-15更新
|
385次组卷
|
2卷引用:河南省南阳市2021-2022学年高一上学期期中考试数学试题
名校
解题方法
9 . 设
,记关于
的不等式
,
的解集分别为
,
,若
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57032c1466f18d9750637c3a00f6a316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382f2b1ae6d19e9c8174105640c196fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa39a289220f0997746805a97c6f1023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-11-15更新
|
233次组卷
|
3卷引用:河南省商丘市部分学校联考2021-2022学年高二上学期期中考试文科数学试题
名校
解题方法
10 . 已知集合
,
,若
,则实数
的取值可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840f27cd6f40b71a1a8fd947be2f6414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b6f567f6407a9f270856d5475464ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次