名校
1 . 已知椭圆的方程为
,则它的焦点坐标为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929070fe8b66d57fcfb19ec2b70218d3.png)
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2 . 在平面直角坐标系
中,椭圆
的左,右焦点分别为
,椭圆
的弦
与
分别平行于
轴与
轴,且相交于点
.已知线段
的长分别为
,则
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fcb20a6972108871adbf284f9e5006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d4aa43f4bf9ade4a8fba4e4a29e924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c28f88812282308b664d3bfc276150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ffdc208786577c5c51e9ecfb6a8ce2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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名校
3 . 以椭圆的两个焦点和短轴两个顶点为四个顶点的椭圆方程为
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名校
4 . 已知结论:椭圆
的面积为
.如图,一个平面
斜截一个足够高的圆柱,与圆柱侧面相交的图形为椭圆
.若圆柱底面圆半径为
,平面
与圆柱底面所成的锐二面角大小为
,则下列对椭圆
的描述中,错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30489cd9c57a2c6283e0fc36129728c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f727d47ac94c374adb4fc3131dcca1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
A.短轴为![]() ![]() | B.离心率为![]() ![]() |
C.焦距为![]() | D.面积为![]() |
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5 . 椭圆
的焦点坐标为 ______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c190e8bb81a4d26cf638ed246193cc9.png)
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解题方法
6 . 根据下列条件,分别求出曲线的标准方程:
(1)焦距是
,过点
,焦点在
轴上的椭圆;
(2)一个焦点是
,一条渐近线方程为
的双曲线;
(3)焦点到准线的距离是
,而且焦点在
轴上的抛物线.
(1)焦距是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b273241821170be56c5251d48386013b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)一个焦点是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c3eda23a1350120ef959ae541d36657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953b0e963195605a67975c6f8f3caa0c.png)
(3)焦点到准线的距离是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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7 . 已知抛物线
与椭圆
有公共的焦点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
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8 . 离心率
的双曲线与椭圆
有公共焦点,则该双曲线实轴长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf225b4a29dc973d00c0d0dd76b45288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608d1a8669aa2426e12751dec3e96da6.png)
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9 . 等轴(实轴长等于虚轴长)双曲线C与椭圆
有公共的焦点,则双曲线C的方程为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae3f914a02c2b5b6bab4e5b1cf4f22.png)
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10 . 如图所示,“嫦娥五号”月球探测器飞行到月球附近时,首先在以月球球心
为圆心的圆形轨道I上绕月球飞行,然后在
点处变轨进入以
为一个焦点的椭圆轨道II绕月球飞行,最后在
点处变轨进入以
为圆心的圆形轨道III绕月球飞行,设圆形轨道I的半径为
,圆形轨道III的半径为
,则下列结论中正确的序号为( )
①轨道II的焦距为
;
②若
不变,
越大,轨道II的短轴长越小;
③轨道II的长轴长为
;
④若
不变,
越大,轨道II的离心率越大.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/bf390483-8d10-4d4b-b4d2-3da8de603ba6.png?resizew=165)
①轨道II的焦距为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24b17abed6bcba3dbbae7471a707293.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
③轨道II的长轴长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44680e496a811023a830d7e9671b2b45.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
A.①②③ | B.①②④ | C.①③④ | D.②③④ |
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2023-12-28更新
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281次组卷
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4卷引用:2.2.2 椭圆的性质(十八大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
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