直线y=kx+1与圆
(α为参数)相交于M,N两点,若
=2
,则k=_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e23f3c822b60404be5aaa1f7f9cbd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86971cee973445cfa3e853edf7ffba10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
更新时间:2020-02-15 09:11:00
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