题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022706-42954.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-61083.gif)
(I)当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-94498.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-74091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-19366.gif)
(Ⅱ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-74091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-19286.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-94498.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022708-90118.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022708-76435.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022708-15290.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-74091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-19366.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022708-64507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022708-17986.gif)
(II)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022708-15290.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022709-58283.gif)
①当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022709-84712.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022709-27160.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022709-99887.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-74091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-19286.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-74091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022710-68242.gif)
②当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022710-18674.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022710-50508.gif)
| ![]() | ![]() | ![]() |
![]() | — | 0 | + |
![]() | ![]() | 极小 | ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-74091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022711-44356.gif)
③当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022711-92303.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022712-42959.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022712-60272.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-74091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-19286.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022707-74091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022712-89611.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022657-19365.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022657-14236.gif)
(I)若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022658-72905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022658-73109.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022657-14236.gif)
(II)若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022658-72905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022658-21504.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022657-14236.gif)
已知
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022644-85912.gif)
(I)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022645-69022.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022645-33112.gif)
(II)对一切
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022645-14559.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022645-45582.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022633-35670.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022633-63100.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022633-94269.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022634-31385.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022634-30702.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022634-10208.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022634-68171.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022634-28155.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022635-66024.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022621-81564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022621-88453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022621-52910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022621-93065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022622-90923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022622-17069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022621-93065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022622-37472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022622-42025.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022623-43788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022623-13715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022623-24116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022623-72112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022624-86586.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019022616-80299.gif)
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