题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232439-42966.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232439-82795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232439-99857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232439-42966.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232440-75489.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232440-94329.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232440-24252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232440-95596.png)
所以此时
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232440-63831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232441-34092.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232434-98632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232434-14237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232434-31021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232430-79959.png)
(1)若圆C与直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232430-77188.png)
(2)在(1)的条件下,求以MN为直径的圆的方程.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232421-59607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232422-74461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232422-98370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232422-16820.png)
(1)求与圆C相切,且与直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232422-98370.png)
(2)O为坐标原点,在直线OA上是否存在异于A点的B点,使得
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232422-78508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-25137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-25137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-10354.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-93737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-25137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-28027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-25137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-68753.png)
(I)求圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-25137.png)
(II)设
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232412-88728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232411-25137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232412-84927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232412-84927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232412-22591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232407-88547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022232408-58677.png)
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