题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001451-68946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001451-30897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001451-35924.png)
A.![]() | B.![]() | C.16 | D.64 |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001452-87489.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001452-23154.jpg)
因为函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001453-39890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001453-16231.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001453-53320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001453-11448.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001444-43360.png)
A.zmax = 12,zmin = 3 | B.zmax = 12,无最小值 |
C.无最大值,zmin = 3 | D.无最小值也无最大值 |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001420-66355.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001420-68090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001403-28224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001403-69380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001403-89401.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001355-52162.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001355-59650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001355-69194.png)
① 当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001355-39777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001355-69194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001356-84642.png)
②
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001356-31862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001355-69194.png)
③ 设点
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001356-66323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001356-10694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001356-66834.png)
其中,所有正确结论的序号是______.
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001348-20869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017001348-53059.jpg)
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