已知点
,直线
:
,两个动圆均过点
且与
相切,其圆心分别为
、
,若动点
满足
,则
的轨迹方程为______ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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20-21高三上·上海松江·期中 查看更多[3]
更新时间:2020-12-03 16:46:15
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解题方法
【推荐1】在等腰梯形中,
,
,
,
,点F是线段AB上的一点,
为AD边上的动点,若
,
,且
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【推荐2】已知抛物线C:y2=2px(p>0)的准线l,过M(1,0)且斜率为
的直线与l相交于A,与C的一个交点为B,若
,则p=_________
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【推荐1】已知两点M(-3,0)、N(3,0),点 P为坐标平面内一点,且,则动点P(x,y)到点M(-3,0)的距离的最小值为
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【推荐2】已知直线
过抛物线
的焦点,
与
交于
两点,过点
分别作
的切线,且交于点
,则点
的轨迹方程为________ .
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【推荐1】设
为抛物线
的焦点,
,
,
为该抛物线上不同的三点,若
,
为坐标原点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69429b4c8548ce637c395ad7ec1a77a7.png)
___________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
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【推荐2】已知点
是抛物线
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为其焦点,以
为圆心、
为半径的圆交准线于
两点,
为正三角形,且
的面积是
,则抛物线的方程是________ .
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