如图,
为椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
的左、右焦点,
是椭圆的两个顶点,椭圆的离心率
,
.若
在椭圆
上,则点
称为点
的一个“好点”.直线
与椭圆交于
两点,
两点的“好点”分别为
,已知以
为直径的圆经过坐标原点.
![](https://img.xkw.com/dksih/QBM/2016/1/5/1572416810254336/1572416815538176/STEM/20f864aa88c048c6bbf7bb0f2c125ede.png?resizew=203)
(Ⅰ)求椭圆的标准方程;
(Ⅱ)△
的面积是否为定值?若为定值,试求出该定值;若不为定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b682c447054bc84b115a3ea80b928393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3511cdc6a9b56bc1d9415d3d94ef0f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a8b4d8f329e5f702d3fee62737d047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2016/1/5/1572416810254336/1572416815538176/STEM/0de1862200424549a1b858257d5eed5e.png?resizew=8)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/2016/1/5/1572416810254336/1572416815538176/STEM/20f864aa88c048c6bbf7bb0f2c125ede.png?resizew=203)
(Ⅰ)求椭圆的标准方程;
(Ⅱ)△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
更新时间:2016-12-03 23:53:06
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相似题推荐
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【推荐1】已知椭圆
的离心率为
,以C的短轴为直径的圆与直线
相切.
(1)求C的方程;
(2)直线
与C相交于A,B两点,过C上的点P作x轴的平行线交线段AB于点Q,且
平分
,设直线
的斜率为
(O为坐标原点),判断
是否为定值?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323227dd8a7a31c078eac609b9acf472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8591c458c5675e87f9f9f8ac2b710ea9.png)
(1)求C的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c69d3964917c9330f291defcbd32c2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e08d5c04f0431fb57b33a01717b599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612367da04a206b8b4369985c367e8f2.png)
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【推荐2】已知椭圆
过点
,离心率为
,直线
与椭圆
交于
两点,过点
作
,垂足为C点,直线AC与椭圆
的另一个交点为
.
(1)求椭圆
的方程;
(2)试问
是否为定值?若为定值,求出定值;若不为定值,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8f9648c81481bb487a43f95c04d991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b343d77ee4dced82ecc479206c42977d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b5c1cad14908e18fd7bc8a96ca9580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b45db8dd8768994af51206565379fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)试问
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
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【推荐1】已知直线
与椭圆
交于
两点,且椭圆过
两点,
为坐标原点.
(1)求椭圆方程;
(2)求
面积的最大值,及此时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16535d128f9c0bd7868cb0fbc78f676d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求椭圆方程;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知椭圆
的长轴长为4,离心率为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/521e42b220eaac30bce6102bd8642104.png)
(1)求椭圆
的方程;
(2)设椭圆
的左焦点为F,右顶点为G,过点G的直线与y轴正半轴交于点S,与椭圆交于点H,且
轴,过点S的另一直线与椭圆交于M,N两点,若
,求直线MN的方程.
(3)圆锥曲线问题的关键一步是条件的翻译,所以请同学们不用解答,翻译下面的条件,转化为数学表达式:
①若直线
与双曲线
交于A、B两点,与其渐近线交于C、D两点,求证:AC=BD.
②椭圆的
左顶点为D,上顶点为B,点A的坐标为
,过点D的直线L与椭圆在第一象限交于点P,与直线AB交于点Q,设L的斜率为K,若
,求斜率K的值.
③椭圆的
左顶点为A,过点A作直线
与椭圆交于另一点B,若直线
交
轴于点C,且
,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/521e42b220eaac30bce6102bd8642104.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7397bd90109ca5ab71e864cf91d58e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4146f877dfe6ca64f603ba1740850195.png)
(3)圆锥曲线问题的关键一步是条件的翻译,所以请同学们不用解答,翻译下面的条件,转化为数学表达式:
①若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae96f5020aef5aef03ec7f406460f608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
②椭圆的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff32d26c8d44f5fb4813a19c1030a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8172214950a628918b4d51fc6b24697.png)
③椭圆的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ff26eeabfaef6e944082999e39e814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】已知椭圆
的左、右顶点分别为
,
,
为
上不同于
,
的动点,直线
,
的斜率
,
满足
,
的最小值为-4.
(1)求
的方程;
(2)
为坐标原点,过
的两条直线
,
满足
,
,且
,
分别交
于
,
和
,
.试判断四边形
的面积是否为定值?若是,求出该定值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff20ed0b3544f29756b858798054a3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff78236f9e8545284c91d5fe456d3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68736e6fe6530d1b4bd4e8e9885de2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a3d1da4469f87ee24e5d80b4270c5a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/2168ed8dde2a1ad204d8593b0e5b5d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db72181c86f471497c667f6cc7e3664.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96198405db093eb43952282a69332f92.png)
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【推荐2】在直角坐标系
上取两个定点
,再取两个动点
,且
.
(1)求直线
与
交点的轨迹M的方程;
(2)已知点
是轨迹M上的定点,E,F是轨迹M上的两个动点,如果直线AE的斜率
与直线AF的斜率
满足
,试探究直线EF的斜率是否是定值?若是定值,求出这个定值,若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/728b3360d5c6394457b907f1cbc31a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a461fda226f0bd4110de4dec466ab5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb4d5fd550c84d02dd68e0b39b1b7c0.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a112d71e48de9093b85d248c6ee2ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d9474ef6e91a668a30481a7c9ca34f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f32ef32dfc25c0432e5be48d2e7c372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff20ed0b3544f29756b858798054a3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54b9320227bac7e03eb44d06bf824ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1bcd06e9f4b4f8589391a55dad676f.png)
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