1 . 选修4-5:不等式选讲
设函数
.
(I)当
时,求函数
的最大值;
(II)若存在
,使得
,求实数
的取值范围.
设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6d5ce720a0667677b98bf7eef100c2.png)
(I)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdbf6506e9de40da0f3c51b81b35a901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(II)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9958560e80c661faf6ca8fb054a38790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2 . 选修4-5:不等式选讲
已知函数
,
.
(1)当
时,解不等式
;
(2)若存在实数
满足
,求
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90740095a080ea485f9a3dea7491e06c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995ec593baa4ef50b6d87c78380953d7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640d3bcd10055871a5ec2f442c1030c1.png)
(2)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61eb3d8a08cc9187d4330d9afca8b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解题方法
3 . 设函数
.
(1)当
时,求不等式
的解集;
(2)对任意
,
不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9464e28b89378eb59d2ff0fb9a35365.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66d61d5f66d68b4c4a2a25fd7103621.png)
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49354b4bd0e60bfa0b9b4fe3f41c7ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567681451f0b2e96f135d2f080df65e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解题方法
4 . 选修4-5:不等式选讲
已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7db6da8c820f8c24b4cb997631b151.png)
.
(1)求
的最小值;
(2)若
对满足条件的一切实数
,
,
恒成立,求实数
的取值范围.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7db6da8c820f8c24b4cb997631b151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fafbee9d72556425c3ab3bf436e743ee.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f352f97803f55b21c0dd569caa4956f9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e3dc8b90223315b80f015db5f7e8d8.png)
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
5 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5667222dc7745a18d87516bb82275f6.png)
(Ⅰ)若
,解不等式
;
(Ⅱ)记函数
的值域为
,若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5667222dc7745a18d87516bb82275f6.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e732c35a5d15e0f8f0d9132b8e6f9449.png)
(Ⅱ)记函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae871ee728f679f884dd2d2135be622d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5347e2eda84313a11d1ab481d6b7767d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2016-12-04更新
|
432次组卷
|
3卷引用:2015-2016学年福建师大附中高二下期末文科数学试卷
名校
6 . 已知函数
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db961e8a6aea01db729710b0596ab49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f233864bb14aff6c801af85104a8503.png)
(Ⅰ)解关于的不等式
;
(Ⅱ)若不等式对任意
恒成立,求实数
的取值范围.
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7 . (1)用分析法证明:
;
(2)用反证法证明:三个数
中,至少有一个大于或等于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698993e45c8e32a140f1ca35b0010ebc.png)
(2)用反证法证明:三个数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e6a8e3f3ac3af2452dad7ad1e37a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf3f23bfec394769b4670962b219999.png)
您最近一年使用:0次
2017-08-13更新
|
69次组卷
|
3卷引用:福建省南平市2016-2017学年高二下学期期末联考数学(理)试题
解题方法
8 . 设函数
.
(1)当
时,求不等式
的解集;
(2)若不等式
,在
上恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3307ce1fb03800e7265000a13c99a6.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec7ef12927ef4e2d8f6721a0ae6b15.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6000b174147cec2de26041837aec1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806256b771e36fbfdb7dedcbf9a9869d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2016-12-04更新
|
662次组卷
|
3卷引用:福建省泉港一中2016-2017学年高二下学期期末考文科数学试题
11-12高二下·福建·期末
名校
9 . 已知不等式
,对满足
的一切实数
都成立,则实数
的取值范围为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90e9daac8881c7e882a3c6dae022e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338ac09ffd9addc3dadf363152c3e39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3fb0c9c7e30bbc0ec8c3521577ee4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2016-12-02更新
|
398次组卷
|
5卷引用:2011-2012学年福建师大附中高二下学期期末模块测试理科数学试卷
(已下线)2011-2012学年福建师大附中高二下学期期末模块测试理科数学试卷(已下线)2013-2014学年河北唐山一中高二下学期期末考试理科数学试卷(已下线)2014人教B版选修4-5 2.4最大值与最小值 优化数学模型河南省林州市第一中学2016-2017学年高二4月调研考试数学(文)试题吉林省蛟河市第一中学校2018-2019学年高二下学期第三次测试数学(文)试题
10 . 选修4﹣5:不等式选讲
已知f(x)=|ax+1|(a∈R),不等式f(x)≤3的解集为{x|﹣2≤x≤1}.
(Ⅰ)求a的值;
(Ⅱ)若
恒成立,求k的取值范围.
已知f(x)=|ax+1|(a∈R),不等式f(x)≤3的解集为{x|﹣2≤x≤1}.
(Ⅰ)求a的值;
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2016/4/19/1572596167262208/1572596173455360/STEM/efae6cf3afe14ed49ca8708f7b32baca.png)
您最近一年使用:0次