已知直线
:
,
:
.
(1)求证:无论
取何实数,直线
与
一定相交;
(2)求
与
的交点
的轨迹方程
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7d336f223ce6bf5931b19d057a931c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684b2bac0840aea14bf2dc86ee2efb23.png)
(1)求证:无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)求
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
更新时间:2019-11-21 09:58:00
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,
是椭圆
长轴的两个端点,
是椭圆上与
均不重合的相异两点,设直线
的斜率分别是
.
(1)求
的值;
(2)若直线
过点
,求证:
;
(3)设直线
与
轴的交点为
(
为常数且
),试探究直线
与直线
的交点
是否落在某条定直线上?若是,请求出该定直线的方程;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533b93dd6eb6b474481247736699c76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d3b51b2e06528f326a689b6c69f115b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca1726d463bd741c904abd9b6589056.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279921f968ec1782d04dda1a1facbc50.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62ec9eb13c5cfca501ff84357595755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc865417ca32c364908d5068851afae.png)
(3)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9471be1cc5f1e85cc30a78d89e1ca5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/e647a32b-6223-4a19-b66d-ded5e6774faf.png?resizew=232)
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【推荐2】一般地,对于直线
及直线
外一点
,我们有点
到直线
的距离公式为:
”
(1)证明上述点
到直线
的距离公式
(2)设直线
,试用上述公式求坐标原点
到直线
距离的最大值及取最大值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a10e787bc8c74feb165fc3ba144ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77dc6fa541a47b1f553f0c512ec0cebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77dc6fa541a47b1f553f0c512ec0cebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd811a480c40f7cd64059c9aadde050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c68c2502f145c4c3f8cd644e725d8a9.png)
(1)证明上述点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77dc6fa541a47b1f553f0c512ec0cebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd811a480c40f7cd64059c9aadde050.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476abe20c52fb91e25fd7d1880ca380b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐1】已知
,直线
的方程为
,直线
的方程为
.当m变化时,
(1)分别求直线
和
经过的定点坐标;
(2)讨论直线
和
的位置关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76947a6a6618fea5b3b072bfc353509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab8a7cfd542c319e13366baa607759b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260c38e335ea68b4172695d6aa9ce574.png)
(1)分别求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)讨论直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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【推荐1】已知动点
到点
与点
的距离之比为2,记动点
的轨迹为曲线C.
(1)求曲线C的方程;
(2)过点
作曲线C的切线,求切线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc316725649b7b32440417fc17dbc4e.png)
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解题方法
【推荐2】已知
.动点
满足:
.
(1)求动点
的轨迹;
(2)当
时,求
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc4d1365519ccd2cbdc568766647c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c58ef72438fec45a88c9e688609681d9.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1cbd369fff4b0d24da9de7086399577.png)
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