已知圆
上的点到直线
的最近距离为
,则k=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c10ddd7a65f48b33aac9b82126924a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a8d6991873e79b298984a95b8954b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6011af1246472cfa38d0a21a320ecac.png)
更新时间:2023-04-16 18:34:10
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