已知抛物线C的焦点为F,点A,B在抛物线上,过线段AB的中点M作抛物线C的准线的垂线,垂足为N,以AB为直径的圆过点F,则
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c683d0f5034025be78bb6be865c8368a.png)
更新时间:2023-05-02 16:16:27
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