过抛物线y2=4x焦点F的直线交抛物线于A、B两点,交其准线于点C,且A、C位于x轴同侧,若|AC|=2|AF|,则|BF|=________ .
更新时间:2020-04-16 15:42:21
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【推荐2】过抛物线
的焦点
的直线交
于点
,交
的准线
于点
,
,点
为垂足.若
是
的中点,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
_________ .
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