解题方法
1 . 已知函数
在
处取得极值.
(1)求常数k的值;
(2)求函数
的单调区间.
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572583030300672/1572583036477440/STEM/fb3507943ab342259a3c60bba6640d9b.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572583030300672/1572583036477440/STEM/24eb9e04911e433ca653499ac6a41f82.png)
(1)求常数k的值;
(2)求函数
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572583030300672/1572583036477440/STEM/ea06a160a2024dbcbe7c91fe30b15b64.png)
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名校
2 . 已知函数
,
.
(1)若
,求函数
的单调区间;
(2)若对任意
都有
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36939a55dc740a4d4112d7bebc7d0a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2016-12-04更新
|
957次组卷
|
2卷引用:2016届黑龙江省哈尔滨三中高三第一次模拟文科数学试卷
3 . 已知函数
有两个极值点,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d31c72ff02d72eccbb8d05118a2566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
4 . 已知函数
,其中
,
为自然对数的底数.
(Ⅰ)求函数
的单调区间;
(Ⅱ)当
时,
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b186e0edbbf478bbcd482edf9474fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0be07495dbc744e1ecabac66f748218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632e88f116c6097af475a688705cfd14.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9b19eca82b3d86f6e9b86507170707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbcdf4b2112ff7ccda0079aa28be47fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2016-12-04更新
|
516次组卷
|
5卷引用:黑龙江省大庆市铁人中学2020届高三考前模拟训练(二)数学(文)试题
5 . 若存在实常数
和
,使得函数
和
对其公共定义域上的任意实数
都满足:
和
恒成立,则称此直线
为
和
的“隔离直线”,已知函数
,
,
,有下列命题:
①
在
内单调递增;
②
和
之间存在“隔离直线”,且
的最小值为
;
③
和
之间存在“隔离直线”,且
的取值范围是
;·
④
和
之间存在唯一的“隔离直线”
.
其中真命题的个数为____________ (请填所有正确命题的序号)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/f684a91081124afdbfd9ada7729541f9.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/c5336f3dd0be41d688a715d65db36ad5.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/450e3715aef748c5b67d5b9cd41fd322.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/3706033d74c242e0a0771ff8decbfa8c.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/8761b75d7d06401f87647f1677ff1be5.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/e257d27b010b4efabc1ba112b3d1c6ee.png?resizew=89)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/5e75ba4b7dbc43fbb2cb92af66f9abce.png?resizew=88)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/87c0aba3aca5453297869339373dc9a9.png?resizew=67)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/450e3715aef748c5b67d5b9cd41fd322.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/3706033d74c242e0a0771ff8decbfa8c.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/336f7d45b34c42b18364ac73fcb63024.png?resizew=112)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/0180ca107a3d45579d2fccc7d4a566fa.png?resizew=105)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/9aad6f910df04e07b5ca15fb1c68187a.png?resizew=89)
①
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/d674969f68b24aa2a8e69e1fa5f2fcb4.png?resizew=127)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/b848095fcbb143eb8a8b14fb6647526d.png?resizew=93)
②
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/0d7e233f8e3249ca97aeb68b78fb5e4b.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/ed5c3e8f8cdc4426b4d566c39ef43dd6.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/c5336f3dd0be41d688a715d65db36ad5.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/289c547a23304dfe97daaf2166446904.png?resizew=21)
③
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/0d7e233f8e3249ca97aeb68b78fb5e4b.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/ed5c3e8f8cdc4426b4d566c39ef43dd6.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/f684a91081124afdbfd9ada7729541f9.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/ba9b215129fa4fe48edfaac6cc0a2007.png?resizew=45)
④
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/0d7e233f8e3249ca97aeb68b78fb5e4b.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/35aacfc3401842ad86e6370d83a1a96d.png?resizew=33)
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572463263440896/1572463269347328/STEM/879a9f1e766047a983abc12806fc73c4.png?resizew=85)
其中真命题的个数为
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解题方法
6 . 已知函数.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9586bb1c02268c1505a61ef850ce8fba.png)
(Ⅰ)设
是函数
的极值点,求
的值并讨论
的单调性;
(Ⅱ)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9586bb1c02268c1505a61ef850ce8fba.png)
(Ⅰ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561800aa679a45da4dbe0e323de1fd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
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名校
7 . 已知函数
.
(1)若函数
在
处的切线垂直于
轴,求实数
的值;
(2)在(1)的条件下,求函数
的单调区间;
(3)若
时,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456115a11bb03c77013ca210d72c41ef.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)在(1)的条件下,求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2016-12-03更新
|
626次组卷
|
3卷引用:2014-2015学年黑龙江省龙东南四校高二下期末联考数学(文)试卷
12-13高二下·黑龙江·期中
8 . 已知函数
.
(1)当
时,求函数
的单调区间;
(2)当
时,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c6ae832a3ff005e237c9d28b33b05a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d032e5867d5f33a72d160f2a45c2340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b916c6d3fb2fdc67421489f207c93903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c7572463225bb3b65cb371f4496440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2011·北京西城·一模
名校
9 . 已知函数
,其中
.
(1)求函数
的单调区间;
(2)若直线
是曲线
的切线,求实数
的值;
(3)设
,求
在区间
上的最大值.(其中
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32627057ce04237418ab2065d44c033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baabfd32465e9e50409413d9c1358279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1483b41cd14145d502c7f3d63d16bb96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e397eac878f4e1c6b9ea484b5d783709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
您最近一年使用:0次
2016-12-01更新
|
1289次组卷
|
14卷引用:2012届黑龙江省大庆铁人中高三第一学期期末考试理科数学
(已下线)2012届黑龙江省大庆铁人中高三第一学期期末考试理科数学(已下线)2011届北京市西城区高三一模试卷数学(理科)(已下线)2011-2012学年福建泉州一中高二第二学期期末考试文科数学试卷(已下线)2011-2012学年湖北省武汉部分重点中学高二下学期期中理科数学试卷(已下线)2011-2012学年浙江省瑞安中学高二下学期期末考试理科数学试卷(已下线)2015届山东师范大学附属中学高三第一次模拟考试文科数学试卷(已下线)2015届河南省中原名校高三上学期第一次摸底考试数学文科数学试卷2015届新疆师范大学附属中学高三12月月考文科数学试卷12015届新疆师范大学附属中学高三12月月考文科数学试卷2(已下线)2013届中国人民大学附属中学高考冲刺六理科数学试卷北京东城区171中学2018届高三上学期期中考试数学试题北京市第七中学2021届高三上学期期中考试数学试题湖南省衡阳市第一中学2020-2021学年高三上学期第五次月考数学试题(已下线)期末测试卷01(B卷·提升能力)-2021-2022学年高二数学同步单元AB卷(苏教版2019选择性必修第一册)【学科网名师堂】
9-10高二下·黑龙江大庆·期末
10 . 已知函数
在
上是增函数,在
上为减函数.
(1)求
的表达式;
(2)若当
时,不等式
恒成立,求实数
的取值范围;
(3)是否存在实数
使得关于
的方程
在区间
上恰好有两个相异的实根,若存在,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea046330f99d9f4f1a9d66764697f7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47acdaa7db189fa7b579edbadaf115d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15113583ceb436b9de63c078c5a553a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0812c835d847da489d22806fa2047ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eea6364dd7a27b8d8d29e41cbb91e06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365480eb2113f88bc7225c120de00b4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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