1 . 已知函数f(x)=xe-ax-lnx+ax-1(a∈R),其中e为自然对数的底数.
(1)当a=0时,求函数f(x)的最值;
(2)若当x>0时,函数y=xe-ax的图象与y=1的图象有交点,求a的最大值;
(3)若f(x)的最小值为0,求a的最大值.
(1)当a=0时,求函数f(x)的最值;
(2)若当x>0时,函数y=xe-ax的图象与y=1的图象有交点,求a的最大值;
(3)若f(x)的最小值为0,求a的最大值.
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2020-12-27更新
|
430次组卷
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3卷引用:重庆市巴蜀中学2021届高三上学期高考适应性月考(五)数学试题
名校
解题方法
2 . 已知椭圆
的长轴长为6,
上一点
关于原点
的对称点为
,若
,设
,且
.
(1)求椭圆
的标准方程;
(2)经过圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f94c7b530a908f1792fbd1e9e7c505a.png)
上一动点
作椭圆
的两条切线,切点分别记为
,
,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6b94e42869013745050aba059b58dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0451f9e4f4db57e9ae978cdc27325698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0863ea5f8e12d70afc71f6de9a6564ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c02d2f96aaecf4120d6a2e0b1d3356.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)经过圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f94c7b530a908f1792fbd1e9e7c505a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f285c23bbc61f073e174b411d4116d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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2020-10-29更新
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1413次组卷
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5卷引用:重庆市重庆复旦中学2020-2021学年高二上学期第二次段考数学试题
名校
解题方法
3 . 函数
,
为
的导函数.
(1)若
,
,证明:
;
(2)若
,且对任意
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1422b18d2390c92ee8c9d90ed23ed4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5683dfcd53bb82370203ec81ceec81.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c09213e68cfa1c481cf4356cc44be34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4b67512069061cee03ae40be57efb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2020-10-16更新
|
635次组卷
|
5卷引用:重庆市第四十二中学校2020-2021学年高二下学期期中数学试题
名校
解题方法
4 . 已知
.
(1)当
时,讨论
的单调性;
(2)若
在
上单调递增,求实数
的取值范围;
(3)令
,存在
,且
,
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52144ccc747046a78522d33a461f24ff.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c765461ae1a6c70f5cbdcb6c932a22b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8d8441014892f9ad3dbaad3f89774e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5f4aadc17b6d5c9760a75fab7fb760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-10-16更新
|
957次组卷
|
4卷引用:重庆市巴蜀中学2021届高三上学期适应性月考(二)数学试题
重庆市巴蜀中学2021届高三上学期适应性月考(二)数学试题重庆市巴蜀中学2021届高三(上)适应性数学试题(二)四川省成都市郫都区2021届高三阶段性检测二理科数学试题(已下线)第六章 导数与不等式恒成立问题 专题十一 利用洛必达法则解决不等式恒成立问题 微点2 利用洛必达法则解决不等式恒成立问题(2)
名校
5 . 已知函数
(
).
(1)当
时,求函数
的单调区间;
(2)讨论
的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5b3862f58d5181ad714f61da779f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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2020-09-04更新
|
1047次组卷
|
4卷引用:重庆市巴蜀中学2020届高三下学期适应性月考九数学(理)试题
名校
6 . 定义在
的函数
(其中
R).
(1)若
,求
的最大值;
(2)若函数
在
处有极小值,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fce155963060b2e5b9147a185897cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d892a73046950e954a0293c425d9bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb71310ec267ea2c2fc0ccaeb2343d0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
您最近一年使用:0次
2020-07-22更新
|
567次组卷
|
3卷引用:重庆市巴蜀中学2019-2020学年高二(下)期末数学试题
名校
7 . 已知函数
.
(1)证明:
;
(2)(i)证明:当
时,对任意
,总有
;
(ii)讨论函数
的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adae33489e582a7c1ce85170df64913c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ed4c8841c6259d5ebb4968788b520d.png)
(2)(i)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41c6b9fa72109ba69163a5c6b7874a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82403591efd1c9b287bbcd3dcfdb1d04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(ii)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次
2020-05-14更新
|
553次组卷
|
2卷引用:重庆市巴蜀中学2019-2020学年高三下学期高考适应性月考(六)数学(理)试题
名校
8 . 已知函数
.
(1)若函数
有两个极值点,求
的取值范围;
(2)若
两个极值点
,试判断
与
的大小关系并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8d2a9163d1250d3678eef1d5a92fa2.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68072473a5106f93e3026d992859f7a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b6ab702f8e93cc1e680a7d7af06786.png)
您最近一年使用:0次
名校
9 . 已知函数
,
,
.
(1)求
的单调区间;
(2)若
有最大值且最大值是
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a16f41d51b6b3a3ea7826c9ce12ec01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0d1d3c0152e049070fee3aff81712b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42740d8f095b5f7825d14c4c312096.png)
您最近一年使用:0次
2020-03-28更新
|
548次组卷
|
3卷引用:重庆市巴蜀中学2019-2020学年高二下学期期中数学试题
名校
10 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b57a08caaa369dab087025c35d38c6e.png)
(1)证明:
有唯一的零点;
(2)当
时,函数
有零点,记
的最大值为
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b57a08caaa369dab087025c35d38c6e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309d64da8745195aa58c5e73f6ad6d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c974e21b0d0748278ce7f0bd0d3a89.png)
您最近一年使用:0次