题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142347-20115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142348-81282.gif)
A.(0,1) | B.(1,2) | C.(2,3) | D.(3,+∞) |
答案
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142316-65584.gif)
区间 | 中点![]() | ![]() | 区间长度 |
| | | |
| | | |
| | | |
| | | |
| | | |
解:设函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142317-88269.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142317-74618.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142317-76759.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142317-74618.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142318-15754.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142318-62804.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142318-97150.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142317-76759.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142318-39429.gif)
下结论:_______________________________。
(可参考条件:
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142319-85465.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142319-32094.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142249-95612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142250-26579.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142249-95612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142250-10163.gif)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142250-50532.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142249-95612.gif)
(2)若对任意实数b,函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142249-95612.gif)
(3)(特保班做) 在(2)的条件下,若
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142251-56991.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142249-95612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142251-95880.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142251-97087.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142230-76354.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142230-76354.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142230-76354.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205142230-76354.gif)
x | 1 | 1.25 | 1.375 | 1.4065 | 1.438 | 1.5 | ||||
f(x) | ![]() | ![]() | ![]() | ![]() | 0.165 | 0.625
|
题型:单选题难度:偏易来源:不详
答案