已知直线
(
)与抛物线C:
及其准线分别交于M,N两点,F为抛物线的焦点,若
,则k等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a043c9776d79f140eeebed847820c1d.png)
更新时间:2019-04-27 21:20:43
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【知识点】 与抛物线焦点弦有关的几何性质
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【推荐2】已知点
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