题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140346-75139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140346-73631.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140346-74058.png)
解析
试题分析:根据题意,由于函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140346-75139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140347-47484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140346-73631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140346-74058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140346-74058.png)
点评:解决的关键是利用导数的符号判定函数单调性,然后借助于单调性来求解最值。属于基础题。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140338-64254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140338-80313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140338-86855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140338-51801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140338-34637.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140339-19244.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140332-86492.png)
A.75 | B.![]() | C.27 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140322-15339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140322-20077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140322-67957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140322-24564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140323-58048.png)
(Ⅰ)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140323-72345.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140323-52669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140323-49954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140323-82929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140314-45598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140314-87342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140315-22972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140315-48829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140314-87342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140315-30937.png)
A.2![]() | B.3 ![]() | C.4![]() | D.5![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140304-66948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140304-50578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140304-76039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017140305-55597.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
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