题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051037-93033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051037-32826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051037-90135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051038-26226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051038-15771.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
答案
解析
试题分析:因为,对任意实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051037-93033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051037-32826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051039-96050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051039-69563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051039-71575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051039-28555.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051040-66201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051037-90135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051038-26226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051038-15771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051038-57707.png)
点评:中档题,在给定区间,导函数值非负,函数为增函数;导函数值非正,函数为减函数。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051028-42425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051028-23063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051029-34424.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051029-10805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051029-35306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051029-81792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051016-88344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051016-92219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051016-70411.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051016-21313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051017-47223.png)
(I)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051017-76940.png)
(II)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051017-15788.png)
(III)对一切
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051017-59151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018051017-55885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050958-69582.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050958-21278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050958-16936.png)
(2)过坐标原点
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050958-72195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050958-47899.png)
(3)令
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050958-41528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050958-79028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050958-77798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050938-42292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050938-28043.png)
(1)讨论
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050939-61878.png)
(2)若对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050939-81103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050939-43969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050939-66102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050940-75968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050923-85307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050923-35652.png)
(Ⅰ) 当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050924-93733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050924-84174.png)
(Ⅱ) 当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050924-32637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050924-84174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050924-98543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018050924-50650.png)
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