到点
与到直线
的距离之比为
的动点的轨迹方程是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd0825e68122a65426840fbf07cf296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ca005f82d4639ccbe7d0a0c89a77a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
更新时间:2018-08-03 11:35:42
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【知识点】 轨迹问题——椭圆
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【推荐1】在平面直角坐标系中,已知点
,
,
是平面内一动点,直线
、
的斜率之积为
,则动点
的轨迹
的方程____________ .
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【推荐2】在△
中,
边长为
,
、
边上的中线长之和等于
.若以
边中点为原点,
边所在直线为
轴建立直角坐标系,则△
的重心
的轨迹方程为:___________________ .
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