题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-71812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-71800.png)
(1)讨论函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
(2)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-75794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-40303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-90395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-54287.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-50404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-92985.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-28438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-57289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-50404.png)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130326-27650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130326-11160.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130326-46173.png)
在区间
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130326-18975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-57289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
在区间
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130326-75760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130327-22077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
在区间
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-50404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130327-30877.png)
综上所述,①当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-28438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-50404.png)
③当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130326-27650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130326-18975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130326-75760.png)
函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130327-62733.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130327-59152.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130328-72887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130328-50944.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130328-43692.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130328-29894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130328-88986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130329-52322.png)
由(1)函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130329-74294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130324-28652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130329-40950.png)
因此
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130325-54287.png)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130316-85533.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130316-18015.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130316-10975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130317-58191.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130318-29053.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130255-28731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130256-17901.png)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130256-75729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130256-33255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130256-79978.png)
(Ⅱ)若对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130256-26272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130256-55494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130257-78569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130257-81261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130257-79522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130257-57576.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130248-98002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130248-90870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130234-18653.png)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130234-57834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130234-46473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130235-87695.png)
(2)若关于
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130235-48774.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130235-73432.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130235-49838.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130235-10745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130236-21663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130236-34565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130223-54424.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130223-28929.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130223-22917.png)
(2)若以
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130224-63633.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130224-53728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130224-78789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130224-45768.png)
(3)若对所有的
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130225-58560.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130225-58817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018130224-45768.png)
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