已知椭圆方程
,左右焦点分别
,
.离心率
,长轴长为4.
(1)求椭圆方程.
(2)若斜率为1的直线
交椭圆于A,B两点,与以
,
为直径的圆交于C,
两点.若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.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/d5c7316976a221c051a2c14df80b1347.png)
(1)求椭圆方程.
(2)若斜率为1的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/7909220d1db380634534190b662ee0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95485530815641d3e7b21b4e73f2b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
更新时间:2024-01-24 19:52:55
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【推荐1】椭圆
的右焦点为
,过
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的切线交
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,切点
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的中点.
(1)求椭圆的方程;
(2)曲线
与椭圆交于四点,若这四个点都在同一个圆上,求此圆的圆心坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bda5b4d2df3a2373e72cb39b33ce85.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0064b3966f15d9b1754c251514b15909.png)
(1)求椭圆的方程;
(2)曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999d6123b771ecbc1fe861c5242865af.png)
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【推荐2】已知椭圆
的长轴长为
,其离心率为
.
(1)求椭圆
的方程;
(2)若
,
是椭圆
上两点,且
,求线段
中点
到原点
的最大距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5a64bcb77f5f64e4af6930c249a270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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【推荐1】已知圆锥的侧面展开图是一个半圆;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/e3cfafb2-d192-4db1-9781-5804b4161818.png?resizew=141)
(1)求圆锥的母线与底面所成的角;
(2)过底面中心
且平行于母线AB的截平面,若截面与圆锥侧面的交线是焦参数(焦点到准线的距离)为p的抛物线,求圆锥的底面半径;
(3)过底面点C作垂直且于母线AB的截面,若截面与圆锥侧面的交线是长轴为2a的椭圆,求椭圆的短轴长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/e3cfafb2-d192-4db1-9781-5804b4161818.png?resizew=141)
(1)求圆锥的母线与底面所成的角;
(2)过底面中心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
(3)过底面点C作垂直且于母线AB的截面,若截面与圆锥侧面的交线是长轴为2a的椭圆,求椭圆的短轴长.
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【推荐2】已知椭圆C:
过点
,左焦点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e1a85a657231ef717809d5a839ad9c.png)
(1)求椭圆C的标准方程;
(2)
分别为椭圆C的左、右顶点,过点F作直线l与椭圆C交于PQ两点(P点在x轴上方),若
的面积与
的面积之比为2:3,求直线l的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9765b719eec5d0ae9fa3e11406f2efc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e1a85a657231ef717809d5a839ad9c.png)
(1)求椭圆C的标准方程;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53294e483f303aa076959d7f8d2bfe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2bbad24988b39dfd85ce7470030aa7.png)
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【推荐1】已知椭圆
的中心在原点,焦点
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(2)若直线
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的右焦点
,且与椭圆
交于
两点,使得
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
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(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](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/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e6444d2b3f4213c5601b9bf61810cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知椭圆
的左,右顶点分别为A,B,且
,椭圆C离心率为
.
(1)求椭圆C的方程;
(2)过椭圆C的右焦点,且斜率不为0的直线l交椭圆C于M,N两点,直线AM,BN交于点Q,求证:点Q在直线
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57dfc9d1109fe41145cc892b5702d9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆C的方程;
(2)过椭圆C的右焦点,且斜率不为0的直线l交椭圆C于M,N两点,直线AM,BN交于点Q,求证:点Q在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
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【推荐1】已知离心率
的椭圆
的一个焦点为
,.
(Ⅰ)求椭圆
的方程;
(Ⅱ)设过原点
且与坐标轴不垂直的直线
与曲线
交于
两点,且点
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce176fdfbb44b8459f441a8d805013f.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)设过原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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【推荐2】已知椭圆C关于x轴,y轴都对称,并且经过两点,
.
(1)求椭圆C的方程;
(2)直线l经过椭圆C的左焦点且垂直于椭圆的长轴,与椭圆C交于D,E两点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
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