已知以
为焦点的抛物线
上的两点
满足
,则
的中点到
轴的距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd68a9b8708b781279d9f526f230fffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
更新时间:2019-05-07 14:25:14
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适中
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解题方法
【推荐1】二次函数
图象上的
、
两点均在第一象限.设点
,当
,
,
时,直线
的斜率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45848d377cad2507fe6846d0882005e7.png)
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名校
解题方法
【推荐2】若点
在抛物线
上运动,点
在圆
上运动,
,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4fb72e39d79b7a0cd892fa5fa34bb7.png)
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解题方法
【推荐1】已知倾斜角为
的直线
过抛物线
的焦点
,且与
交于
、
两点(点
在第一象限),若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6a9d524d18a251797d7e3a280c855.png)
__________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】抛物线
的焦点为
,在
上存在
,
两点满足
,且点
在
轴上方,以
为切点作
的切线
,
与该抛物线的准线相交于
,则
的坐标为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
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