已知椭圆
上任取一点
,过
作
轴的垂线段
为垂足,动点的
满足
.
(1)求
的轨迹方程
;
(2)直线
与
相交于
两点,当弦
最短时,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a951bf8266d2028c1923d0de0248fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d339507d4fdd74561b404ef2375b04c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d15f9d8bbee16805266ce11274f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c178c9abab25de6a69a3d5b98c55bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
更新时间:2020-11-21 10:15:16
|
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适中
(0.65)
解题方法
【推荐1】已知
,动点
满足
;
(1)求动点
的轨迹方程
;
(2)过
作两条互相垂直的直线
,分别交曲线
于
四点,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c8ff52d1095ebb34088fcea1c1cdf2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3310147e8459ccd5766601ff1af7beb.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aca0df0114b82ceb5448231ec0b70b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e41bb93091181ea9471e306e7e1d46d.png)
![](https://img.xkw.com/dksih/QBM/2016/6/23/1572798513299456/1572798519607296/STEM/85ad574e7eaa43ccacb1240c64b95b5d.png)
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适中
(0.65)
解题方法
【推荐2】已知动直线
(其中
且
为变动参数)和圆
相交于
、
两点,求弦
的中点的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9577cafbb11070eb862ffa395a9c766e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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适中
(0.65)
解题方法
【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a29ba49963134a7232fa8574105fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168369ce9de586230d93f22a7276845a.png)
您最近一年使用:0次
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名校
【推荐2】已知圆
和点
,直线
过点
与圆交于
两点.
若以
为直径的圆的面积最大,求直线
的方程;
若以
为直径的圆过原点,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b65445271ce9b38c1927b73420bead7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241ce9bd28046ce9b90f43b391132884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
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