一条线段的长等于
,两端点
分别在
轴和
轴上移动,若动点
满足
,则动点
的轨迹方程是_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9429e7879366222d76936c61063f9161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
更新时间:2022-04-15 14:45:15
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【知识点】 求平面轨迹方程
相似题推荐
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适中
(0.65)
【推荐1】曲线
是平面内到直线
和直线
的距离之积等于常数
的点的轨迹,下列四个结论:
①曲线
过点(-1,1);
②曲线
关于点(-1,1)成中心对称;
③若点
在曲线
上,点
分别在直线
上,则
不小于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44173efda0a576e883832c2326415c94.png)
④设
为曲线
上任意一点,则点
关于直线
,点
及直线
对称的点分别为
,则四边形
的面积为定值
.其中,所有正确结论的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e611c9450509447d31c3b8f46195f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7712260b9136c187e571f2e52b07ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6e6253ce9c46ba6ea53280f58e2e86.png)
①曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
③若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3979f27823cdcba516dfa885d8afe19d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44173efda0a576e883832c2326415c94.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e611c9450509447d31c3b8f46195f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7712260b9136c187e571f2e52b07ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7807638578edd712265463a7a5eab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed5e36820cd2163ff8a5775ce150022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df3b11806341ab369b0e399575fd12b.png)
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解题方法
【推荐2】希腊著名数学家阿波罗尼斯与欧几里得、阿基米德齐名.他发现:“平面内到两个定点A,B的距离之比为定值
的点的轨迹是圆”.后来,人们将这个圆以他的名字命名,称为阿波罗尼斯圆,简称阿氏圆.已知在平面直角坐标系
中,
,点
是满足
的阿氏圆上的任一点,若抛物线
的焦点为
,过点
的直线与此阿氏圆相交所得的最长弦与最短弦的和为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a08f5d6f91366da27e9b96452bb04977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e5a3d6850c63927bb564f98c22cb56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3476833e1aa9840c0ea61146c342963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8c6a532018342321db87de69e41a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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