题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-70055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-67197.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-30201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-77758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-99428.png)
(2)若在区间
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-17749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-77919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-76924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-42219.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-80024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-36420.png)
解析
试题分析:(1)先求导函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-83704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-51857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-99601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-41867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-42817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-75509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-37059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-47417.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-28452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-42219.png)
试题解析:(1)函数的定义域为
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-80153.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-30201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-28432.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-67204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-68369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-69497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-77758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-99428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-80024.png)
(2)令
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-41867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-80153.png)
在区间
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-17749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-77919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-76924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-61535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-17749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-42817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-86199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-34403.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-64822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-37059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-47417.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092705-28452.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-66356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-98645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-75509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-17749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-34878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-36420.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-33553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092707-28847.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092707-12636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092706-98645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-75509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092707-32982.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-75509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092707-36596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-42817.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092707-80555.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-75509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092703-17749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092707-36596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-42817.png)
综上:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-42219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092704-36420.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092646-88644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092647-27873.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092647-50016.png)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092647-50016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092647-94870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092647-55795.png)
(1)若a=0,判断f(x)的单调性;.
(2)若x>1时,f(x)<0恒成立,求a的取值范围.
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092624-23421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092624-36538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092624-91604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092624-79528.png)
已知
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092615-17835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092615-54290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092615-33756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092615-54290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092615-11874.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092616-70833.png)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092616-99545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092607-25954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018092607-77426.png)
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