解题方法
1 . 已知函数
,
是
的导函数.
(1)若
,求
的最值;
(2)若
,证明:对任意的
,存在
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba0590bfe6fee53debda0623143c94c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fd2fe40ae95873abef94e3ad3c1404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58604780911a76cc68bf8b035c987a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c7ad2c01ea2780f1d166298a599530.png)
您最近一年使用:0次
解题方法
2 . 设函数
,
.
(1)当
时,求
的值域;
(2)当
时,不等式
恒成立(
是
的导函数),求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb87668d7dc84f470182b32a1790a359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78100bb4c068a8e5eb5f1364e2ebf762.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21376567e7a56b85e967dc4f2a5cef3.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/811051b02ae3d0f756475e8e5d4c442b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
3 . 对于数列
,称
(其中
)为数列
的前k项“波动均值”.若对任意的
,都有
,则称数列
为“趋稳数列”.
(1)若数列1,
,2为“趋稳数列”,求
的取值范围;
(2)已知等差数列
的公差为
,且
,其前
项和记为
,试计算:
(
);
(3)若各项均为正数的等比数列
的公比
,求证:
是“趋稳数列”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98816fb04cd9855c376352b915c41b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6aaee5e84eb6c6a4f339fe82c20025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6aaee5e84eb6c6a4f339fe82c20025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca48e93a553f5828b86e09f4d5f1042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(1)若数列1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)已知等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370c1c8c958a7010fa144eb32e23f8d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f0bf06a83e595c7195e5c3cfd53a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea88016f672b8f54901e457cceecca1.png)
(3)若各项均为正数的等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fecd48d65ac4f8197c45231f68e8bce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
您最近一年使用:0次
2020-02-01更新
|
1848次组卷
|
5卷引用:2016届上海市松江区高三上学期期末质量监控(文)数学试题
19-20高三上·江苏南通·期末
名校
4 . 已知函数
,
,若函数
有3个不同的零点x1,x2,x3(x1<x2<x3),则
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66a43b254f93c8cbe479faccc6e2c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f23c8009e183e3222489b0e1957c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea601aaea3412c2e85a712578815a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8041d05164696deb23adfd427fec4f.png)
您最近一年使用:0次
2019-01-31更新
|
2676次组卷
|
9卷引用:【市级联考】江苏省如皋市2019届高三第一学期期末教学质量调研数学试题
(已下线)【市级联考】江苏省如皋市2019届高三第一学期期末教学质量调研数学试题2019届四川省三台中学高三下学期第一次模拟数学(理)试题(已下线)理科数学-2020年高考押题预测卷03(新课标Ⅰ卷)《2020年高考押题预测卷》黑龙江省大庆市铁人中学2020届高三考前模拟训练(二)数学(理)试题海南省海南中学2021届高三第五次月考数学试题(已下线)专题03 函数与导数(文理)江苏省南京市2021届高三下学期二模数学试题湖南省长沙市雅礼中学2023届高三上学期第一次月考数学试题(已下线)第三章 一元函数的导数及其应用 专题3 与隐零点有关的关系研究