已知①如图,长为
,宽为
的矩形
,以
、
为焦点的椭圆
恰好过
两点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/be549ee0-fbe7-4ca1-9ffb-686e11786fe0.png?resizew=238)
②设圆
的圆心为
,直线
过点
,且与
轴不重合,直线
交圆
于
两点,过点
作
的平行线交
于
,判断点
的轨迹是否椭圆
(1)在①②两个条件中任选一个条件,求椭圆
的标准方程;
(2)根据(1)所得椭圆
的标准方程,若直线
与椭圆相交于
、
两点,求
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/f326db309ab6bf16acfab03080650c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/be549ee0-fbe7-4ca1-9ffb-686e11786fe0.png?resizew=238)
②设圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e8ffd8a6f46d6076861da6157e8274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c6eb7b48a27ad17219d724328b37cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)在①②两个条件中任选一个条件,求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)根据(1)所得椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a8d6991873e79b298984a95b8954b9.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/a9e726b83f27a18399ec5c68a1fed838.png)
2021高三·全国·专题练习 查看更多[4]
更新时间:2021-11-01 14:24:48
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【推荐1】已知椭圆
的离心率为
,短轴的一个端点到椭圆的一个焦点的距离为
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(Ⅰ)求椭圆C的方程;
(Ⅱ)若直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
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【推荐2】飞船的轨道是以地球的中心
为一个焦点的椭圆,选取坐标系如图所示,椭圆中心在坐标原点,近地点A距地面200千米,远地点B距地面350千米,已知地球半径
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![](https://img.xkw.com/dksih/QBM/2022/4/22/2963678093647872/2964859106369536/STEM/5d4977de199441e096a580638b0e71ff.png?resizew=248)
(1)求飞船飞行的椭圆轨道方程;
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(a,b分别为椭圆的长半轴与短半轴的长),请问:飞船平均飞行速度每秒多少千米?(结果精确到0.01千米/秒,
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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde4a8e61ea013525b4f22da0095943.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963678093647872/2964859106369536/STEM/5d4977de199441e096a580638b0e71ff.png?resizew=248)
(1)求飞船飞行的椭圆轨道方程;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf5db3306551d5a6b54c34c74a4d83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
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【推荐1】已知B,C是两个定点,
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【推荐2】如果点
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名校
【推荐1】已知椭圆
的长轴长是短轴长的2倍,左焦点为
.
(1)求椭圆
的方程;
(2)若
是椭圆
的右焦点,过点
且斜率为1的直线交椭圆
于
两点,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17618d8d22ebb3fd6835a7eb139b4f95.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b5c81ee16e93e9822c4dc54c362cb3.png)
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【推荐2】在直角坐标系
中,已知椭圆
的右顶点、下顶点、右焦点分别为A,B,F. 若直线
与椭圆E的另一个交点为C,求四边形
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