题目
题型:不详难度:来源:
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答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044005-96740.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044005-81622.gif)
直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044004-56649.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044006-56387.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044006-67678.gif)
由①②得
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044006-63667.gif)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044006-86988.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044007-21963.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044007-78985.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044008-71018.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044008-86787.gif)
由③④⑤得
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044008-42617.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044008-69702.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044005-96740.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043955-99038.gif)
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