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解题方法
1 . 已知圆
过点
,且与直线
相切于点
.
(1)求圆
的方程;
(2)平面上有两点
,
,点P是圆C上的动点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4089640d15616839ff459028276e1bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf7c6ab8c57d444b744573761266a0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a053d9e72b6cb386dcea870bc61aa2a.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)平面上有两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892f57757d6b80b89d8df9449302057d.png)
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