设中心在坐标原点的椭圆E与双曲线
有公共焦点,且它们的离心率互为倒数.
(1)求椭圆E的方程;
(2)是否存在过点A(2,0)的直线交椭圆E于P,Q两点,且满足
,若存在,求
的面积;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8600f91ee8e169d150527b5b86b83.png)
(1)求椭圆E的方程;
(2)是否存在过点A(2,0)的直线交椭圆E于P,Q两点,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
2018高三上·全国·专题练习 查看更多[2]
更新时间:2018-11-09 21:00:11
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【推荐1】已知椭圆
的离心率为
,点
在椭圆C上,椭圆C长轴的左右端点分别为
.
(1)求椭圆C的方程;
(2)直线
交椭圆C交于M,N两点,设直线
的斜率分别为
请问是否存在常数m,使得
恒成立,若存在求出m的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)求椭圆C的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a7108d77b8ad681a6b7573ecac0406.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e4d7503a7d57ba242ad4e05c7006a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c7b9abecc9e86717cf477a65af7e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d23ab10cae054f00399da04ad42d68.png)
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【推荐2】已知椭圆
的离心率
,左、右焦点分别为
,
,且
与抛物线
的焦点重合.
(1)求椭圆的标准方程;
(2)若过
的直线交椭圆于
,
两点,过
的直线交椭圆于
,
两点,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a0a43a5b4d5b4bb4e3e936b032a80a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
(1)求椭圆的标准方程;
(2)若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.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/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c761dad84bd29109dc0ffc31b9cbbd46.png)
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【推荐1】已知椭圆
的离心率为
,直线l:y=x+2与以原点O为圆心,椭圆的短轴长为直径的圆O相切.
(1)求椭圆C的方程;
(2)求椭圆C与直线y=kx(k>0)在第一象限的交点为A.
①设
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fe956b1a657aca9c05d0c758f9e464.png)
,求k的值;
②若A与D关于x的轴对称,求
AOD的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
(1)求椭圆C的方程;
(2)求椭圆C与直线y=kx(k>0)在第一象限的交点为A.
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07682612e7fa19ed99f57c262c4de2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fe956b1a657aca9c05d0c758f9e464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
②若A与D关于x的轴对称,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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【推荐2】已知椭圆
的长轴长为4,且椭圆
与圆
:
的公共弦长为
.
(1)求椭圆
的方程
(2)椭圆
的左右两个顶点分别为
,直线
与椭圆
交于
两点,且满足
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.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/422b31d8339243824d623eebec2b325d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd55f837e9c4e6bba1163ef13edd09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
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【推荐1】已知椭圆E:
(a>b>0)过点
,且离心率
.
(1)求椭圆E的方程;
(2)设过原点O的直线l交椭圆E于M,N两点,点
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef233ad3db01fa3ce9ee94eaad8e64e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
(1)求椭圆E的方程;
(2)设过原点O的直线l交椭圆E于M,N两点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e675cbeeb2e2ca81719c0302790ada5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
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【推荐2】设椭圆
的离心率
,过点A
.
(1)求椭圆
的方程;
(2)求椭圆C被直线
截得的弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2de52259b426acb42761fec59a7748.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求椭圆C被直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
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【推荐1】如图,直线
与椭圆
交于
、
两点,记
的面积为
,
,
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5a64bcb77f5f64e4af6930c249a270.png)
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【推荐2】已知椭圆
的离心率
,且过点
.
(1)求椭圆方程;
(2)已知
、
为椭圆的上、下两个焦点,
是过焦点
的一条动弦,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c9bebea391a1f9956dfcca98d9d1f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b08f8b169599e2c8ebe2f3a94afd6e4.png)
(1)求椭圆方程;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
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