名校
1 . 选修4-5:不等式选讲.
已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368431fb28361058e0081628a9d73648.png)
.(1)当
时,函数
的最小值为4,求实数
的值;(2)若对于任意
,不等式
恒成立,求实数
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368431fb28361058e0081628a9d73648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3210274e57cc0487a58b99ea274b8aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52fb51c831740d9fe307c03537080448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417b9a109e3dcc3346f7f810e0c22ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6096dcd8029361d0734ce9382291d02b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
2 . 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.
您最近一年使用:0次
名校
3 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898c7ce54d637b1549ffb0f30bdca2b0.png)
(1)解不等式
;
(2)若存在实数
,使得不等式
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898c7ce54d637b1549ffb0f30bdca2b0.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c678921233dad2692ac54dfe2588802.png)
(2)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea40b5e7c172414523d66395754988f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解题方法
4 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d1019246a653a14a5dc1bdf9d3487d.png)
(1)若
,证明:
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d1019246a653a14a5dc1bdf9d3487d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8612c32279bef2fc914c685f475a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369100ccd44feaa77e5f119ea949a879.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d4da2b54bf28ff8346a73e11065459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 已知函数
,若对任意的
,都有
成立,实数
的取值范围为______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501f618cac9c3c9edb01470ac5aed8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2608a57caffde627dbf140ca22a2ff8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
6 . 已知函数
,若关于
的不等式
的解集非空,实数
的取值范围为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4b264f258c76909f1729a777dd8c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b41401205ffd923bd4faec4e1c22fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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7 . 已知函数
,
.
(Ⅰ)当
时,解不等式
;
(Ⅱ)若任意
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036fd1de458f1b71cd921b4008e28733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f5f4525b21aeaacaa2920840fdfea9.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.png)
(Ⅱ)若任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2017-04-22更新
|
208次组卷
|
2卷引用:福建省仙游金石中学2018届高三上学期期中考试数学(文)试题
解题方法
8 . 已知函数
.
(1)若
恒成立,求实数
的最大值
;
(2)在(1)成立的条件下,正实数
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3b743cb215e038746703dc9039f9c4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29d8a43948e858bc50fa6bca8772842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)在(1)成立的条件下,正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e8762c14ba07710784f3a0d554d38ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b0e403c5f00d0357d3fa30d6c2717c.png)
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2013·福建漳州·一模
9 . 已知函数![](https://img.xkw.com/dksih/QBM/2013/8/23/1571319354097664/1571319360151552/STEM/1b23eb5ea9f646929b5b9b55ab068df0.png)
(I)当
时,求不等式
的解集;
(Ⅱ)若
的解集包含
,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2013/8/23/1571319354097664/1571319360151552/STEM/1b23eb5ea9f646929b5b9b55ab068df0.png)
(I)当
![](https://img.xkw.com/dksih/QBM/2013/8/23/1571319354097664/1571319360151552/STEM/38d926f1d8574fba949169dc373cf539.png)
![](https://img.xkw.com/dksih/QBM/2013/8/23/1571319354097664/1571319360151552/STEM/6d315aa548804140b6d5b287920eab34.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2013/8/23/1571319354097664/1571319360151552/STEM/0a6c0063a9e5448e8b0cc89db95434de.png)
![](https://img.xkw.com/dksih/QBM/2013/8/23/1571319354097664/1571319360151552/STEM/86a18385361a47e7a7b92d4f289b04e7.png)
![](https://img.xkw.com/dksih/QBM/2013/8/23/1571319354097664/1571319360151552/STEM/26a8e13c15074925a0e8938c99fee061.png)
您最近一年使用:0次
2016-12-02更新
|
1114次组卷
|
3卷引用:2013届福建省漳州市四地七校高三6月模拟考理科数学试卷
10 . 选修4-5:不等式选讲
已知函数
.
(1)解不等式
;
(2)已知不等式
的解集为
,且
,求实数
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6a81634543f6d38a9a43c1d3c41e45.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f37f4cf19a5ca3ab61a84171a0010f.png)
(2)已知不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96a4b9b4b52507b51da6ec99a2262c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025b73e17cab2eaf0fadf373cfee519a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次