1 . 已知关于
的不等式
的解集为
.
(1)求集合
中的最大数
;
(2)若正数
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a9d0b36990e2a2e18c5badc88c6a38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23854f2daebc895eca7cf824a328aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580e71f257bca2d1c4ad237d9db9c46a.png)
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2 . 若不等式
对
恒成立,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6fb271e4cfe682dd6a7df3477a2459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-08-25更新
|
283次组卷
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3卷引用:河南省新乡市2020-2021学年高二下学期期中考试数学(文)试卷
名校
3 . 已知集合
,
,则
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6cd09fe641888faecadebbe85ab771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb818979651ca871f933d05cd810621b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-08-25更新
|
859次组卷
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2卷引用:河南省焦作市普通高中2020-2021学年高一下学期期中考试数学试题
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解题方法
4 . 已知函数
,
.
(1)当
时,求不等式
的解集.
(2)是否存在实数
,使得不等式
的解集包含
?若存在,求
的取值范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5927f1c8962514fc26881eb33bbb1bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641e26c9b344f9b471c87e2f93c54686.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdda91b3f668548adb7ea3b66759f99.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdda91b3f668548adb7ea3b66759f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b85da66243efd91e7c606c42f17da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2021-08-12更新
|
207次组卷
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2卷引用:河南省新乡市2020-2021学年高二下学期期中考试数学(文)试卷
解题方法
5 . 已知函数
.
(1)当
时,解不等式
;
(2)若不等式
恒成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5808364796071ffff1f3264794fd8c36.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfec4233214c3a729c843dee0d186db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b781b577380833bf91d2b2f1169c50.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0756ca575dadb9c928dbef4acaa27342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2021-07-09更新
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4卷引用:河南省天一大联考2020-2021学年高二下学期期中考试文科数学试题
河南省天一大联考2020-2021学年高二下学期期中考试文科数学试题河南省濮阳市2020-2021学年高二下学期期中数学文科试题宁夏银川一中、云南省昆明市第一中学2023届高三联合考试一模数学(文)试题(已下线)宁夏银川一中、云南省昆明市第一中学2023届高三联合考试一模数学(文)试题
6 . 若关于
的不等式
的解集为
.
(1)求实数
,
的值;
(2)若实数
,
满足
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255d905c1933a3eea5dbb2d34b095ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76abedfdb7c616dd0bf6cc9c81b005e1.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149dd7718dffd3282757c38d8e737fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e578c0a23a8a0e6e350b45b3ab3396e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2829c622b49f474e815aa14f302a9f25.png)
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2021-07-08更新
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2卷引用:河南省“领军考试”2020-2021学年5月高二期中考试理科数学试题
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7 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9cedb45717c9d42dfe190827208d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fd2ab63511f441f539cca001760adbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-06-25更新
|
265次组卷
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2卷引用:河南名校联盟2020-2021学年高一下学期期中考试数学(文)试题
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解题方法
8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b17745429b71ddf0baabc4f5a65e8c.png)
(1)解不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
(2)若
对任意实数
都成立,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b17745429b71ddf0baabc4f5a65e8c.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80315917e7f564864105cd4c7e95fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2021-06-23更新
|
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5卷引用:河南省商开大联考2020-2021学年高二下学期期中考试数学(文)试题
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9 . 已知不等式
的解集为
.
(1)求集合
;
(2)已知
为集合
中的最小正整数,若
均为正数,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5d6caad1e7bd3dddf1db774f38acda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31376c6bb2fff6100b237608f19de496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734e89512f4ff17b36293ea0675a9ca8.png)
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10 . 已知
.
(1)当
时,求不等式
的解集
;
(2)对实数
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd2fad9f5af33c69827a6814419f880d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f304e283ff342ed29fa5bbb7c95889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)对实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf142a356077dc2dbe12fe81742a76ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e2cdb26b6c6019773a508e91932ce7.png)
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2021-04-16更新
|
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2卷引用:河南省平顶山市大联盟2020-2021学年高二下学期期中数学试题