1 . 在平面直角坐标系
内,有一动点
到直线
的距离和到点
的距离比值是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
(1)求动点
的轨迹
的方程;
(2)已知点
(异于点
)为曲线
上一个动点,过点
作直线
的垂线
交曲线
于点
,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150193befc6ea4a027990c5cf216351e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd050ed2c70c403379758235904a2cd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2611b3bd448c5f08a5505537819dae62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f32c6247426b2d3e6c2ae4bf1baca8e.png)
您最近一年使用:0次
2 . 已知点
,
,
,是平面内一动点,
可以与点
重合.当
不与
重合时,直线
与
的斜率之积为
.
(1)求动点
的轨迹方程;
(2)一个矩形的四条边与动点
的轨迹均相切,求该矩形面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e810cb506e1746a0a49610e0d897f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63309dbc3612815f6dbdee23d9a10adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)一个矩形的四条边与动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2014·安徽芜湖·二模
解题方法
3 . 在平面直线坐标系XOY中,给定两点A(1,0),B(0,-2),点C满足
,且
.
(1)求点C的轨迹方程.
(2)设点C的轨迹与双曲线
(
)相交于M,N两点,且以MN为直径的圆经过原点,求证:
是定值.
(3)在(2)条件下,若双曲线的离心率不大于
,求该双曲线实轴的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69baa2692da8eab9cb9259c3d2b04378.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048745938798b407c1dac9b3c48a0b8f.png)
(1)求点C的轨迹方程.
(2)设点C的轨迹与双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80235d30a95d6cf370a71589ba2101d8.png)
(3)在(2)条件下,若双曲线的离心率不大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次