(1)已知点
的坐标为
,直线
相交于点
,且它们的斜率之积是
,求动点的轨迹方程;
(2)已知定点
的坐标为
为动点,若以线段
为直径的圆恒与
轴相切,求动点
的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c4930856e680e806ad4ae7899be73f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9f8345e498be7c7a47fc80edfa0c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2267442b286785e89a0b5fb19b039669.png)
(2)已知定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c727407f30a16747261d17a32079df97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
更新时间:2017-12-21 07:42:31
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【推荐1】已知
是以
为焦点的双曲线
上的动点,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】已知圆C:x2+y2﹣4x+3=0,
(1)求过M(3,2)点的圆的切线方程;
(2)直线l:2mx+2y﹣1﹣3m=0被圆C截得的弦长最短时,求直线l的方程;
(3)过原点的直线m与圆C交于不同的两点A、B,线段AB的中点P的轨迹为C1,直线
与曲线C1只有一个交点,求k的取值范围.
(1)求过M(3,2)点的圆的切线方程;
(2)直线l:2mx+2y﹣1﹣3m=0被圆C截得的弦长最短时,求直线l的方程;
(3)过原点的直线m与圆C交于不同的两点A、B,线段AB的中点P的轨迹为C1,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1b9f56bbba1aad0ed778d2250b1805.png)
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【推荐1】在平面直角坐标系中,已知A(m,0),B(0,n),且
,线段AB上一动点P(x,y)满足
.
(1)求点P的轨迹C的方程;
(2)过(-2,0)的直线l与C交于M,N两点,试探索当t为何值时,点T(t,0)能使
为定值,并求该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c769a79cf006a9d0652e134e831a83b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7abbb644b54728c0ad56c37bc345aa.png)
(1)求点P的轨迹C的方程;
(2)过(-2,0)的直线l与C交于M,N两点,试探索当t为何值时,点T(t,0)能使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fa4729c5ac7062d40bbcf3e49312d2.png)
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【推荐2】如图所示,已知圆
,定点A(1,0),M为圆上一动点,点P在AM上,点N在CM上,且满足
点N的轨迹为曲线E.
(1)求曲线E的方程;
(2)若直线
与(1)中所求点N的轨迹E交于不同两点F、H,O是坐标原点,且
,求
FOH的面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d723ec3118dcc3be5c552b3d4bda4ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e07b31ab5ee77bd9594d1a3625a8ce5.png)
(1)求曲线E的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4461428976cf15e54ecc90f47a9e787d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35deb6bfefe2c92b1b35eb2f5a18ae5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2012/2/1/1570707204964352/1570707210518528/STEM/de6c7bd1-52ce-4ab5-9211-d6bc7670a636.png?resizew=237)
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【推荐1】在直角坐标系
中,已知一动圆经过点
且在
轴上截得的弦长为4,设动圆圆心的轨迹为曲线
.
(1)求曲线
的方程;
(2)过点
作互相垂直的两条直线
,
,
与曲线
交于
,
两点,
与曲线
交于
,
两点,线段
,
的中点分别为
,
,求证:直线
过定点
,并求出定点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐2】已知定点
和定直线
.动点
到定点
的距离比到定直线
的距离少1.记动点
的轨迹为曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
的方程.
(2)若以
为圆心的圆与抛物线交于
不同两点,且线段
是此圆的直径时.求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63309dbc3612815f6dbdee23d9a10adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0778559e1601f19625786dc20304fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0778559e1601f19625786dc20304fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc44797d05f315cb4ae3967ec32262a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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