已知点
,动点
在x轴上,动圆C的半径为2,圆心C在直线
上,点P 是圆C上的动点,则
的最小值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c49e659536d31f4af36fde616da59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e85cd588fe40212b2c94618a6fca8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58074abb4db310bf32c188a7f0b271f8.png)
更新时间:2019-04-13 11:06:29
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