1 . 已知函数
.
(1)求
的单调区间;
(2)判断
在
上的零点的个数,并说明理由.(提示:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a41ab7d138ed6b1ea7d89f97521e39.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b21f53d7086a65e0745140317445714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0953fad19df05e9fa3b42a745b916f3c.png)
您最近一年使用:0次
2020-05-16更新
|
286次组卷
|
2卷引用:2020届湖南省五岳高三下学期5月联考文科数学试题
2 . 已知函数
.
(1)求曲线
在点
处的切线方程;
(2)判断函数
的零点的个数,并说明理由;
(3)设
是
的一个零点,证明曲线
在点
处的切线也是曲线
的切线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6893d5235c3d397b729bfe08d4cd82a2.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2eff609c6043c2a89a6dd163fe2244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf51a27a2198dc15b385951486efeff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
您最近一年使用:0次
2020-05-11更新
|
967次组卷
|
5卷引用:2020届北京市朝阳区高三第一次模拟考试数学试题
解题方法
3 . 对于定义域为
的函数
,如果存在区间
满足
是
上的单调函数,且
在区间
上的值域也为
,则称函数
为区间
上的“保值函数”,
为“保值区间”.根据此定义给出下列命题:①函数
是
上的“保值函数”;②若函数
是
上的“保值函数”,则
;③对于函数
存在区间
,且
,使函数
为
上的“保值函数”.其中所有真命题的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87994ae61610018ff807bcf62f9faac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be315e528951120e7d551f654d2a1f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5b38ef8cef8e11773c71d161f37373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6feae1b3b9fd99df33762b488dd2ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbae0d22d931ac42b565c7990764a2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d82332f79318e612122e696354826c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbae0d22d931ac42b565c7990764a2c1.png)
A.② | B.③ | C.①③ | D.②③ |
您最近一年使用:0次
名校
4 . 有以下四个命题:①在
中,
的充要条件是
;②函数
在区间
上存在零点的充要条件是
;③对于函数
,若
,则
必不是奇函数;④函数
与
的图象关于直线
对称.其中正确命题的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f114df5ceabdb7e5fd3fdad4eaf056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ac161789cda0e6ab9447b4b4815777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/928fdf8d1c1289b1a4de1975152b6537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c67f5cfce32b3ed37987a4baa430062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26efb9f32f6cb608753f9189c6b48644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
您最近一年使用:0次
5 . 点
在曲线
上,过
作
轴垂线
,设
与曲线
交于点
,
,且
点的纵坐标始终为0,则称
点为曲线
上的“水平黄金点”,则曲线
上的“水平黄金点”的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4cf24a80b18295de4dffac92430f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f7ce3df87af1efae817f3fb7e69fa35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2020-04-20更新
|
454次组卷
|
5卷引用:2020届燕博园联考高三综合能力测试(全国卷I)数学理科试题
解题方法
6 . 已知
,设
是关于
的方程
的实数根,记
,
.(符号
表示不超过
的最大整数).则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e222994e1f675ea6e1eeb973f42014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d117c51ae0d7744b5802850e145f8442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bff7123d9869deb06c6ca813afdb8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3d4dcc06e0006f176ade89da5fa9d7.png)
A.1010.5 | B.1010 | C.1011.5 | D.1011 |
您最近一年使用:0次
名校
解题方法
7 . 已知函数
在区间(1,3)上有最大值,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2fefc15b5b47033d6f8d801ba11ecbe.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-04-16更新
|
877次组卷
|
10卷引用:广东省茂名市五大联盟学校2018届高三9月份联考试理数试题
广东省茂名市五大联盟学校2018届高三9月份联考试理数试题海南省(海南中学、文昌中学、海口市第一中学、农垦中学)等八校2018届高三上学期新起点联盟考试数学(理)试题广西桂林、崇左、防城港市2020届高三联合模拟考试数学(文)试题河北省武邑中学2018届高三上学期期末考试数学(理)试题【校级联考】湖北省郧阳中学、恩施高中、随州二中三校2018-2019学年高二下学期期中考试数学(文)试题(已下线)江西省南昌市江西师大附中2019-2020学年高二下学期第一次月考数学(理)试题陕西省宝鸡市长岭中学2020-2021学年高三上学期期中理科数学试题(已下线)江苏省苏州市吴中联考2019-2020学年高二下学期期中数学试题福建省南平市浦城县2018-2019学年高二下学期第一次月考数学(理)试题江西省寻乌中学2022-2023学年高二下学期第二次阶段性测试(6月)数学试题
8 . 已知函数
,直线
是曲线
在
处的切线.
(1)求证:无论实数
取何值,直线
恒过定点,并求出该定点的坐标;
(2)若直线
经过点
,试判断函数
的零点个数并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6345a00cf5c4dea07bf00c4ccc560be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(1)求证:无论实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/110d3e40e0fbb017ec72c3d9923ae624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次
解题方法
9 . 已知函数
,
,若对任意的
,存在实数
满足
,使得
,则
的最大值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f98d30a1aeb3b01237d62b741fde40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73a205bfa4d44f79dfe892c7b9fbe9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4cc00c283519973f7f8e1274b5c733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04fe966866f7ad311adedd93cf25c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a5e8e97215eb557780d75846bc0d7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.3 | B.2 | C.4 | D.5 |
您最近一年使用:0次
解题方法
10 . 函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87c5b0de6b53853c43e6e58fc31f35a.png)
且
的图象是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87c5b0de6b53853c43e6e58fc31f35a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7dcaa4308d648b9ab4f04a437dfdb03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c27ab806ec806a7a6763bcb8bd7b50b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-04-08更新
|
335次组卷
|
2卷引用:2018届湖南省怀化市高三第一次模拟数学(理)试题