题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043856-94005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043856-76692.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043856-94005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043856-76692.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-50808.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043856-94005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-54812.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-47187.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043858-81378.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-50808.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043858-41864.jpg)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043858-48568.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043858-84065.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-50808.gif)
设经过直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043859-88588.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043859-39819.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043859-45390.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-50808.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043856-94005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-54812.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043859-33908.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043900-45841.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043900-58535.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-50808.gif)
由A、B是直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043856-94005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043856-94005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043857-50808.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043851-21713.gif)
求证:AB∥
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043851-21713.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043844-27745.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043845-91930.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043845-56548.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043845-99272.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043839-82327.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043839-82327.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043839-33975.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043839-82327.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043831-56759.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043831-56266.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043831-94194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043831-51946.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043831-65581.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043817-10830.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043817-32625.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043818-17199.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043818-31432.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043818-66404.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043818-77903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043819-25427.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043819-80504.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043819-56985.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043819-23667.gif)
(1) 求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043820-82991.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043820-17794.gif)
(2) 求
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043820-47315.gif)
(3) 求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043820-45207.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043821-51725.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106043821-49572.gif)
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