2010·湖北·一模
1 . 已知函数
在区间
上为增函数,且
.
(1)当
时,求
的值;
(2)当
最小时,
①求
的值;
②若
是
图象上的两点,且存在实数
使得
,证明:
.
![](https://img.xkw.com/dksih/QBM/2011/3/7/1570027970805760/1570027976474624/STEM/9832bd99d948469f8f081f19e34b1bc0.png?resizew=91)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484ab53a0d934088e6e78ef8756650ee.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ee0ab940f7a797f8183c644bd1f692.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c67e353542f73d064aa069135077705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e99c498612bc0ac9d75d4dcc9008c7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69264c1535cf0ccdac2d186da669df9.png)
您最近一年使用:0次
2012·北京朝阳·二模
2 . 已知函数
.
(Ⅰ)若曲线
在点
处的切线与直线
垂直,求实数
的值;
(Ⅱ)讨论函数
的单调性;
(Ⅲ)当
时,记函数
的最小值为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae89d392ab40b7a706d7af01e9d6ba2.png)
(Ⅰ)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c887da0c850acf41ab249cc262ae39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f52cb58b6bc5d71030463ba7e28134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅲ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9e4282d7dae7489a24f8888eeabdbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb1f5f9a92f91e4fbb159ec021d90b9.png)
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11-12高三上·江苏宿迁·阶段练习
3 . 函数
的定义域为
,图象过原点,且
.
(1)试求函数
的单调减区间;
(2)已知各项均为负数的数列
前n项和为
,满足
,求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c039eee173aabb321eece3c9ac9a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde86c3083ba8090da3dc2ee1c7fe37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f600769e8004ee2f072bf153422dbf.png)
(1)试求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知各项均为负数的数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9920117e061c3b8ebb545fe15c4f9eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa82ed1c5ffe1cf4015301d4a8d0c11.png)
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11-12高三上·江西·阶段练习
4 . 已知函数
在(0,1)内是增函数.
(1)求实数
的取值范围;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dcea8200be47c6e42f66941fa8f8b55.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e033f6300237b5224707a7b243f69224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd8192f8184316cf5ee17ae1c1f625a.png)
您最近一年使用:0次
2011·福建厦门·一模
5 . 已知函数
,
.
(Ⅰ)当
时,求函数
的最小值;
(Ⅱ)当
时,讨论函数
的单调性;
(Ⅲ)求证:当
时,对任意的
,且
,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cb970dba9328c236e2e47b54a06d1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a878fd5a7104a7f42770a19097d56457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅲ)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.png)
![](https://img.xkw.com/dksih/QBM/2011/6/2/1570231039647744/1570231045357568/STEM/fdfc5b43dfe04289863f56af5adb9760.png?resizew=100)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc0689dc1df301ebbee9974952e02cce.png)
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11-12高三上·山东济宁·阶段练习
真题
名校
6 .
,其中
.
(Ⅰ)当
时,求曲线
在点
处的切线方程;
(Ⅱ)当
时,求
的单调区间;
(Ⅲ)证明:对任意的
,
在区间
内均存在零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d2c9b019daf91098f903d1997b59f78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51159984b2cb00f30b3986315019623.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅲ)证明:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380cfbad9bd4e5e1ae8906f28c15439d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
您最近一年使用:0次
2016-12-03更新
|
2821次组卷
|
5卷引用:2011年普通高等学校招生全国统一考试文科数学(天津卷)
2014·陕西·模拟预测
名校
解题方法
7 . 已知函数
.
(1)试判断函数
的单调性;
(2)设
,求
在
上的最大值;
(3)试证明:对任意
,不等式
都成立(其中
是自然对数的底数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb22a3be54684a8fd9c7fd21c432fca4.png)
(1)试判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6179ae6bab235331b4ef2a917f165ef.png)
(3)试证明:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69994a493ffd50c56413463476d3cf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
您最近一年使用:0次
11-12高一上·浙江·期中
解题方法
8 . 已知函数
(
、
是常数),且
,
.
(1)求
、
的值;
(2)当
时,判断
的单调性并证明;
(3)对任意的
,若不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ef6aa2be05c634493bbd7f2f732eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc38756cc1783da1370c90beac9ff1cf.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97148e04ca6a9f9dca0aba91ce4e1d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dace8f47a04f7fd67cd5d7a24bc1baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef829146470d708be16e8b9aa885191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
11-12高三上·安徽蚌埠·阶段练习
9 . 已知
,函数
.
(1)当
时讨论函数的单调性;
(2)当
取何值时,
取最小值,证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf105efd4cf5f580d0561e54d923e347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3788b7536ec53e726b4c0f694d2a640.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
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2021·全国·模拟预测
名校
解题方法
10 . 设函数
.
(1)求函数
的单调区间;
(2)若函数
有两个不同的零点
,
,
为
的导函数,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98452a45746410926fa3ab006338854e.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e737b076dbc720db3030a7efb84e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd888afdcfdb3e91a157d50f65e915e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b91118c18ef731302a7a54f33702bf.png)
您最近一年使用:0次