题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000657-74504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000658-72378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000658-55058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000658-66201.png)
A.18 | B.6 | C.![]() | D.![]() |
答案
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000659-83915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000659-59958.png)
当且仅当
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000659-25633.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000650-37636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000650-67573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000650-84577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000651-48251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000651-11173.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000635-84646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000636-13006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000636-79511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000636-71985.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000636-85070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000636-21426.png)
A.![]() | B.8 | C.9 | D.12 |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000629-24712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000629-28414.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000630-96819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000630-54090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000630-48430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000630-83154.png)
A.![]() | B.8 | C.9 | D.12 |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000619-88336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000620-29029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000620-16945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016000620-16730.png)
A.3 | B.3.5 | C.4 | D.4.5 |
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