解题方法
1 . 已知函数
,
,设
的最大值为
,若
的最小值为
时,则
的值可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bbfff3e69f32bf56e006ed6f1052a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 设函数
.
(1)求不等式
的解集;
(2)若关于x的不等式
有解,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448e83086fec8b4b216fd245c7697b44.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be1d8c6384d7fabddb693b2b7fcdf4a.png)
(2)若关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c496794e0a88d5ce7baa9b16bbd36e0.png)
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解题方法
3 . 已知函数
.
(1)当
时,求不等式
的解集;
(2)若对任意
,不等式
恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741de7c562b373daadefa2b2951c4d65.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f736cda382d56904384b35122ba12d2.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5944018092787f40843ee9aa636c3222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62fea461fad925c190ea1ef33a92ccc.png)
您最近一年使用:0次
2020-07-11更新
|
220次组卷
|
4卷引用:青海省海东市2020届高三第五次模拟考试数学(文)试题
名校
4 . 设函数
.
(1)求不等式
的解集;
(2)若
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6429620734e012e3a57db28476d74.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b33cc5994177b42becfac463fd3486.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a268aeb109e69a90cc6154cf8372e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解题方法
5 . 对任意
,不等式
恒成立,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e8272e1e42c8a796ce42ad875f4d508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-07-09更新
|
463次组卷
|
3卷引用:浙江省浙江大学附中2020届高三下学期全真模拟考试数学试题
解题方法
6 . 函数
.
(1)当
时,求不等式
的解集;
(2)若
的解集包含
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a0ec1e607c6140c265a60842d77301.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369100ccd44feaa77e5f119ea949a879.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57627145c511a9e9024263eb09c5405b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2ec965488c7e1cea085463c7731285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
解题方法
7 . 已知函数
.
(1)若不等式
无解,求实数a的取值范围;
(2)当
时,函数
的最小值为2,求实数a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006d854d86e4b8e3f5cb363e7f130687.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4953b8b85739e095697567da50915a66.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cfada8fd642ddf968bfd4228d48ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
您最近一年使用:0次
2020-07-06更新
|
361次组卷
|
5卷引用:2020届山西省运城市高三6月考前适应性测试数学(理)试题
名校
解题方法
8 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
时,求不等式
的解集;
(2)当
时,若
恒成立,求实数a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743570a5e44dcea6a7a04e7796fda136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293d639e67df2da17966a567db2656e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ed633bfebf61f2126f3ff58fb8e75.png)
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解题方法
9 . 定义二元函数
则不等式
的解集是____ ;若不等式
对任意实数
恒成立,则实数
的最大值是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f457f719b0aae1afa9a577e4a0c7610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db07068a20e521c17253ae478e359b66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cf0f403d0d279bccd07ec55dd77482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
10 . 若对任意
,当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcfc9a14e722151dbdb326123e88ac4.png)
时,不等式
恒成立,则实数
的取值范围是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe571faa5f606b165821e5c28f0c547c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcfc9a14e722151dbdb326123e88ac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1295b852efee8d6d0a92cbe38439c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb90d82e4efb3fccf16c6ea8a7ea75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次