在平面直角坐标系
中,点
,过动点P作直线
的垂线,垂足为M,且
.记动点P的轨迹为曲线E.
(1)求曲线
的方程;
(2)过点
的直线
交曲线
于不同的两点
、
,若
为线段
的中点,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ceac12e2d6e5bcdc11b6f614c2696e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dbfb03691870e2537b489e995578a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f594316d5332361c14fc4781c169ce55.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
更新时间:2022-10-19 17:49:19
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【推荐1】如图,在梯形
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![](https://img.xkw.com/dksih/QBM/2022/5/24/2986464484057088/2987164597338112/STEM/eaa73a21-a692-45d7-848b-3ced273477a6.png?resizew=192)
(1)若
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![](https://img.xkw.com/dksih/QBM/2022/5/24/2986464484057088/2987164597338112/STEM/eaa73a21-a692-45d7-848b-3ced273477a6.png?resizew=192)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1064febe4e68fa2a5dccc0e7e6d75f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2cf03ac7a1b0aba75daa3b9f9b5768.png)
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解题方法
【推荐2】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424b980bcc2535735329fc60b918f2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e1b984363e879c7f9ff6b58b203fb0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/768c2dc0a82653036a626de3b84f46cb.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐1】已知△ABC的两个顶点坐标为A(-2,0),B(0,-2),点C在曲线y=3x2-1上移动,求△ABC的重心的轨迹方程.(注:设△ABC的顶点为A(x1,y1),B(x2,y2),C(x3,y3),则△ABC的重心为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5064d552ff9b3a47caae71d5097a56a2.png)
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【推荐2】设抛物线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)若点M的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9c6ac9f9e6f9919accfdfcf0074294.png)
(2)当M在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1704032413ac0663ac1575484aa00ab8.png)
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