已知圆
经过
两点,圆心
的轨迹是什么?画出它的图形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/326d234f-efd9-4a50-bdaa-75f61002639e.png?resizew=121)
更新时间:2019-05-16 20:47:54
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【知识点】 求平面轨迹方程
相似题推荐
解答题-问答题
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较易
(0.85)
名校
【推荐1】设
,
为两定点,动点
到
点的距离与到
点的距离的比为定值
.
(1)求
点的轨迹
方程;
(2)当
时,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc9b0c80bc9d3597008e857a5acf263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db352d4e404e556705c82691fb598c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30b80276dac1ca0e8d2bb8866e26210.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1edc21a2299cf3e51e60186e5fab8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4753800836034674170e9f241fb8ec14.png)
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解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】如图,设P是圆
上的动点,点D是P在x轴上的射影,M为PD上的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/95210531-7bbc-4c4d-9007-268b053ee458.png?resizew=155)
(1)当P在圆上运动时,求点M的轨迹C的方程;
(2)求过点
且斜率为
的直线被C所截线段的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54329a84abb204cecb237b2bf2ff2bb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/95210531-7bbc-4c4d-9007-268b053ee458.png?resizew=155)
(1)当P在圆上运动时,求点M的轨迹C的方程;
(2)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
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