1 . 已知函数
.
(1)对任意
,方程
恒有三个解,求实数
的取值范围;
(2)已知
,方程
有三个解为
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e192502357b3e10f50bd3b0722a0a0.png)
(1)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d191d6de821fbb06a51b5a20112db6de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cdb88f1a91377f6fb80b3df012815d.png)
您最近一年使用:0次
名校
解题方法
2 . 已知函数
.
(1)若对
时,
,求正实数a的最大值;
(2)证明:
;
(3)若函数
的最小值为m,证明:方程
有唯一的实数根,(其中
是自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f273fd3c903d427c1f998752beeb866.png)
(1)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e77ca0f7418cc670ec1a52160416c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37daea6922640bec3f3e2bf0cd9dfd95.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5997b64ccf7ead8d1857ef970bca7a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bf47a8f69ce2fbec0776e38e10aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11204e2fb6e560bf7a4ca26eaebfc526.png)
您最近一年使用:0次
2023-04-12更新
|
1738次组卷
|
5卷引用:浙江省金华十校2023届高三下学期4月模拟数学试题
浙江省金华十校2023届高三下学期4月模拟数学试题(已下线)模块八 专题11 以函数与导数为背景的压轴解答题江苏省南通市如皋中学2022-2023学年高三下学期4月阶段测试数学试题四川省眉山市仁寿县第一中学2022-2023学年高二下学期第二次月考数学(理)试题(已下线)第九章 导数与三角函数的联袂 专题四 利用导数证明含三角函数的不等式 微点4 利用导数证明含三角函数的不等式综合训练
名校
3 . 已知函数
.
(1)证明:当
时,
;
(2)设
为正实数且
.
(i)若
,证明:
;
(ii)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fea324edb8150948d6dc43521d7d35.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636289ad84b4a3a51095dd32ca201f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa18838a13fda4e45612c32cdf98b71.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
(i)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdc0e0ca559f0f1af6127545f356fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029e4c2994ddc8ec41c0df310d97c1e2.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98142ea0f193bf24f84230a7251476fc.png)
您最近一年使用:0次
4 . 已知各项均为正数的数列
满足
为其前
项和,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3953ae50c016128b44cc1723f8bf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023·四川凉山·一模
5 . 已知
有两个零点
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c207efd83d75c1f69237d97616c726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb08970bc56eee3bc4ed2ed622c5c13.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
6 . 已知函数
,记
.
(1)当
时,求函数
的最小值;
(2)若函数
有三个零点
,且
.
①求
的取值范围;
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a52da3c12cdf18c6fb5ce8a9da75b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a024eb03d7ffb3b510d1a131af3576bf.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57514ce816c30fa1d75f5b7e901ae499.png)
您最近一年使用:0次
名校
解题方法
7 . 已知函数
,
的导函数为
.
(1)记
,讨论函数
的单调性;
(2)若函数
有两个零点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dae74c724114bfeff024dd7b79f5edc.png)
(i)求证:
;
(ii)若
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce0d7c37c3ea3a9118076602a723e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0bbe4d31d570b5875ca1713620ece1.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eba291e5371783fc025d6d268e0b6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dae74c724114bfeff024dd7b79f5edc.png)
(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe583c9ddd13fac626e9700983429566.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a2fc8fa2fcadb0e75b53132be35f9d.png)
您最近一年使用:0次
2022-04-23更新
|
832次组卷
|
3卷引用:浙江省金华市曙光学校2022届高三下学期5月模拟数学试题
名校
8 . 已知
,设函数
,
.
(Ⅰ)当
时,求
的单调区间;
(Ⅱ)设
,
,且
,
,证明:
(ⅰ)
;(ⅱ)
.
注:
为自然对数的底数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f5dd0b3b431e5098f2e8dc67700a9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a274b0623171972513340511781ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ee27cf71657bbdb7f0be716a0e5a71.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a9bb26472ca40b8a619bfd9ea06a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311cff32b515f4fa954a3a5731cbb52c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f0f5eea04b6f47958ee178abcaf93f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c58a29f7a9646cb557b08b5e547a19.png)
(ⅰ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59901c0c549d69b28234ae9001e964e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684bcf84f0a266515bfafde0da903050.png)
注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797bbd18359c9a29842b39109b3a0aac.png)
您最近一年使用:0次
2021-10-19更新
|
901次组卷
|
3卷引用:浙江省金华市第一中学2022届高三上学期第一次模拟考试数学试题
解题方法
9 . 已知函数
.
(1)求
在点
处的切线方程;
(2)若方程
有两个实根
,且
,证明;
时,
.(注∶e为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a26f3341c78d51f60a5ac57eeaa5a1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c36300180be6ee56f4345157fa723a.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5809a06357f94fc7a2156c7e7af1ed2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdd632a4ac64e56262d92a0593ffcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132f835c340c2aa56a61e6c50c9f3fd2.png)
您最近一年使用:0次
10 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ae3a06e2db61ce958f143eb7f7390b.png)
(1)讨论函数
在其定义域内的单调性;
(2)若
对任意的
恒成立,设
,证明:
在
上存在唯一的极大值点
,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ae3a06e2db61ce958f143eb7f7390b.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab409bb25958c2f01c73e26042c6f51e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c18afdb50661c8ec52baeafbafcf912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff30073e4f791a35a33a4f6fabb3bd6.png)
您最近一年使用:0次