题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013837-27261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013837-67722.png)
(1)试确定常数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013837-99520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-38366.png)
(2)试判断
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013837-27261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-17817.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-50384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-60216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-17817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-72454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013839-48013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-17817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013839-14758.png)
解析
试题分析:(1)先求出导函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013839-46166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013839-63399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013839-37497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013840-45094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013840-59826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013840-93312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013840-25942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013840-71081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013841-10835.png)
试题解析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013839-46166.png)
由已知得:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013840-59826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013841-52261.png)
(2)由(1)得
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013841-25936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013841-51354.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013840-71081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013841-10835.png)
![]() | ![]() | 1 | ![]() | 2 | ![]() |
![]() | — | 0 | + | 0 | — |
![]() | ![]() | 极小值 | ![]() | 极大值 | ![]() |
故在
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-60216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-17817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-72454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013839-48013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013838-17817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013839-14758.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013829-77372.png)
A.![]() | B.0<![]() | C.b>0 | D.b<![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013822-67333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013822-21964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013822-72023.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013823-85113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013814-37203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013814-42573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013814-91732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013814-94679.png)
(1)将
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013815-16643.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013815-16643.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013759-59894.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013800-79937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013800-39834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013800-53038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013800-55430.png)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013800-39834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013800-33090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013801-99916.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013801-69550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013801-12090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013801-64243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013753-31212.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013753-87708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013753-38296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013753-52101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013753-47773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013754-44590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013753-38296.png)
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