1 . 已知函数
(其中
)表示的曲线在点
处的
切线方程为
.
(Ⅰ)求
的值;
(Ⅱ)若
对于
恒成立,求实数
的取值范围;
(Ⅲ)求证:当
时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39af904747343482a9e9b83b9f6e6486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4a4796ea2a81a4408d47f865428de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e460896eb3b3826735ff8b3a1e34f60d.png)
切线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5667c886b7f744aec110cc393429236b.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ab9b3610c3d5e741235fc6c838517c.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4dc40c70198ea868ee807aad970845d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939367072bcf6962f5ad71be9ddb373b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(Ⅲ)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083eecb7a39add34ebb6ddc184fd3652.png)
您最近一年使用:0次
2018-12-22更新
|
238次组卷
|
2卷引用:河南省信阳市2020届高三上学期第二次教学质量检测(期末)数学(文)试题
11-12高三·天津·阶段练习
名校
解题方法
2 . 已知函数
.
(Ⅰ)若
,求
的取值范围;
(Ⅱ)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819375a803ff8dadfc4ce99de4c83eba.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eba993940e67e8cdddc68aa8a325cf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e66e29e6bc5eb68dd4972315918b7be.png)
您最近一年使用:0次
2016-12-01更新
|
1346次组卷
|
6卷引用:河南省南阳市第一中学2018届高三第九次考试数学(理)试题
河南省南阳市第一中学2018届高三第九次考试数学(理)试题(已下线)2011—2012学年天津市天津一中高三第一次月考理科数学试卷(已下线)2012届海南省洋浦中学高三第三次月考理科数学试卷吉林省榆树一中2017-2018学年下学期高二期末考试理数试题【全国百强校】陕西省西安市长安区第一中学2018-2019学年高二上学期期末考试数学(文)试题陕西省西安中学2021届高三下学期第四次模拟数学(文)试题
2013·湖南益阳·一模
解题方法
3 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eaa6e654ff597ab4324559e4a94ad0f.png)
(1)当
时,求函数
的单调增区间;
(2)求函数
在区间
上的最小值;
(3)在(1)的条件下,设
,证明:
.(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eaa6e654ff597ab4324559e4a94ad0f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a05911070640037fda4c54885a42731.png)
(3)在(1)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662b3257911238e73b709af4968f3935.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5e37e208d98cb7acbe1d29dcc6a929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0591d9f78b4f4f78c5bd6baaa602ae0.png)
您最近一年使用:0次
2016-12-02更新
|
1497次组卷
|
3卷引用:河南省八市2018-2019学年高二下学期第二次质量检测数学(理)
名校
4 . 已知函数
,
.
(1)记
,试判断
在区间
内零点个数并说明理由;
(2)记(1)中的
在
内的零点为
,
,若
在
有两个不等实根![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
,判断
与
的大小,并给出对应的证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9901b4ec0f966497a8780b3e0c6fc555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d12e984154a27294e4ae5b3b06f9229.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
(2)记(1)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e279183c1b1d7b1da507c85b2f914509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ed85df132609692e69e78f24710eda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a7a4a037a4dfe973f1eb683d93d799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b5f32c09caa0be0d4c33be07aa4530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77397fbf8224ec0ae05cdf385839f70c.png)
您最近一年使用:0次
5 . 已知函数
,其中
.
(Ⅰ)讨论
的单调性;
(Ⅱ)设
在
处存在极值,
,若存在
,使得
(
为
的导函数),证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1327d912b8f14a16aefe5d244a419623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(Ⅰ)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc1aae47cab7e6ae23f9a1cbeb9c5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fb992900bf2a31e0c15a4616ee12ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78a42eee5a1d033a2f7025ff58b28ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22add663bd26e87d972a10dc5fd9ada1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a406200f8826fbce9733175fa2cedad.png)
您最近一年使用:0次
6 . 已知函数
.
(1)当
时,讨论函数
在区间
上零点的个数;
(2)证明:当
,
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c6f31696d83f13224b46735b8b5dab.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef118cce5443a4d794561f5ef8e1fcc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918a513d84efa8d10c54e4686fe54b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0beae1dd5c28f22f22f5fd2172a0de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b61adc4745f283e4072ddd762f92ffe.png)
您最近一年使用:0次
名校
7 . 已知函数
.
(1)若函数
在
上是减函数,求实数
的取值范围;
(2)当
时,分别求函数
的最小值和
的最大值,并证明当
时,
成立;
(3)令
,当
时,判断函数
有几个不同的零点并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e287e72920b5dce50ec18ede29483e.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737521fef4ad8f44bc9ee866d1a2f3b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337a23f9bf790be6e03b88fb2d03f18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3980c52927f12c114f3b291ad714d778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536fc5b70329960827b706efabd5646c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b98cf204b417669d2adfb058d18acc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3980c52927f12c114f3b291ad714d778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c302988b56319163f3ed9cde8e7cc9d.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2279374fc9eac1c44a2eca6fed9f8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c06c7ea720c57b3ed73f10c2ae99d0ef.png)
您最近一年使用:0次
名校
解题方法
8 . 已知
.
(1)若关于
的方程
在
上恒成立,求
的值;
(2)证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f27d35effbad7b1c39e3dc580ded96a.png)
(1)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b129a86f37fbbdf5a5808f13924e819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c05bf96461dde5a28222833c2ed9936.png)
您最近一年使用:0次
2018-01-18更新
|
619次组卷
|
2卷引用:河南省中原名校2018届高三上学期第五次联考数学(理)试题
解题方法
9 . 已知函数
,
.
(1)求函数
的单调区间与极值;
(2)求证:在函数
和
的公共定义域内,
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428d922e63d8a0838da6fdacee919ccd.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcac5b738cd5ea12f6d93e9c5fc6bcd5.png)
(2)求证:在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcc45127c22c8402b41f02b73382d0a.png)
您最近一年使用:0次
名校
10 . 已知函数
.
(1)讨论函数
的单调性;
(2)当
时,证明:对任意的
,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def75dd091f5b3d6388b6aac1619ef0a.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d217c7b12e12e5fb67472452518859ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d450630bff3ade2e06fce93bf59cd8b6.png)
您最近一年使用:0次