题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003209-22582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003209-24966.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003209-94692.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003211-79378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003211-40109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003211-83860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003211-33828.png)
点评:利用均值不等式
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003212-92582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003212-52095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003212-71374.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003203-47224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003203-90517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003204-59834.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003150-90999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003150-72404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003145-45136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003134-45802.png)
c为何值时,等号成立.
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003130-51536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003130-59044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003131-76700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016003131-81168.png)
A.18 | B.12 | C.9 | D.6 |
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