题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115802-79272.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115803-43046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115803-77860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115803-78033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115803-73279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-90590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-32800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-48740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-11288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-46842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-48546.png)
①求
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
②当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-34606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-77828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-75012.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-77687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-61194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-68345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-68913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-52113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-53294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-76977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-96122.png)
(2)①
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115808-90361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115808-46251.png)
解析
试题分析:(1)先求出导函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115808-20215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115808-26404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-31976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115803-73279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-77687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-52113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-61415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-80382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-48740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-72658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-40688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-32800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-11288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-46842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-48546.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-32800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115810-23429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115810-50519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115810-18722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115810-86708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-40688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-72658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-41109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-34606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-37628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-34606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-32800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-19509.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115808-20215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-79849.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115808-26404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-31976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-77687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-61415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-61194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-68345.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115809-80382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115806-68913.png)
同理
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-52113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-53294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-76977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115807-96122.png)
(2)①由(1)及
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-38917.png)
又由
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-11288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-79849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-48546.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-32800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115810-23429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115810-50519.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115810-18722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115810-86708.png)
所以由条件
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115812-56351.png)
此时有
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115812-28396.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115808-90361.png)
②又设
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-41109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-37628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-46842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-19509.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115812-63523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115812-34179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115813-93408.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115813-41211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-37628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-19509.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115813-85374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-37628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115805-46842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115813-61754.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-28906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115804-32800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115811-19509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115808-46251.png)
核心考点
试题【已知函数.(1)当且,时,试用含的式子表示,并讨论的单调区间;(2)若有零点,,且对函数定义域内一切满足的实数有.①求的表达式;②当时,求函数的图像与函数的图像】;主要考察你对导数的意义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115751-86113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115751-36731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115751-83112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115751-36731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115751-86113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115751-36731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115752-77430.png)
A.1个 | B.2个 | C.3个 | D.4个 |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115728-83731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115728-21928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115717-11832.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115717-44028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115717-23778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115717-20581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115717-51067.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115717-44028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115718-69727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115708-96840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115708-60435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115708-79443.png)
(1)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115708-18109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115709-92998.png)
(2)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115709-49920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115659-10126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115659-56972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115659-93415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115659-10126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115700-64063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115700-62754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115700-20867.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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