在平面直角坐标系中,圆O交x轴于点F1,F2,交y轴于点B1,B2.以B1,B2为顶点,F1,F2分别为左、右焦点的椭圆E,恰好经过点
.
(1)求椭圆E的标准方程;
(2)设经过点(﹣2,0)的直线l与椭圆E交于M,N两点,求△F2MN面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e9ca197ac13a116c18abb983a12825.png)
(1)求椭圆E的标准方程;
(2)设经过点(﹣2,0)的直线l与椭圆E交于M,N两点,求△F2MN面积的最大值.
18-19高二上·河南安阳·阶段练习 查看更多[2]
更新时间:2020-03-18 00:27:22
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相似题推荐
【推荐1】椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
的左右焦点分别为
,左右顶点为
,
为椭圆
的上顶点,
的延长线与椭圆相交于
,
的周长为
,
,
为椭圆
上一点.圆
以原点
为圆心且过椭圆上顶点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/efa10838-68d6-416e-89e3-9e1544f9afc3.png?resizew=196)
(1)求椭圆
的方程;
(2)若过点
的直线与圆
切于
,(
位于第一象限),求使得
面积最大时的直线
的方程;
(3)若直线
与
轴的交点分别为
,以
为直径的圆与圆
的一个交点为
,判断直线
是否平行于
轴并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82eb4ba631d0f50d848aa6e576b379.png)
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(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcaebaf8ceed245eba896f36d8ff14b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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解答题-问答题
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(0.4)
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解题方法
【推荐2】已知椭圆
的右焦点是
,过点F的直线交椭圆C于A,B两点,若线段AB中点Q的坐标为
.
(1)求椭圆C的方程;
(2)已知
是椭圆C的下顶点,如果直线y=kx+1(k≠0)交椭圆C于不同的两点M,N,且M,N都在以P为圆心的圆上,求k的值;
(3)过点
作一条非水平直线交椭圆C于R、S两点,若A,B为椭圆的左右顶点,记直线AR、BS的斜率分别为k1、k2,则
是否为定值,若是,求出该定值,若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e26ecf79ff798bea2905459ee3be77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae96dfb5e5aea1980eca113ed96280e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f950447f46fa8e1f794e1f0538da2eb.png)
(1)求椭圆C的方程;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e347bb30f42706093d1f3cad6e84c2c0.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2260143c82eb12512e3f328044da6bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67351fe10fcfc3f9072eec4c60bfaaa5.png)
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【推荐1】已知椭圆
的左焦点为
,其四个顶点围成的四边形面积为
.
(1)求曲线E的方程;
(2)过点F的直线l与曲线E交于A,B两点,设AB的中点为M,C、D两点为曲线E上关于原点O对称的两点,且
,求四边形ACBD面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e1a85a657231ef717809d5a839ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
(1)求曲线E的方程;
(2)过点F的直线l与曲线E交于A,B两点,设AB的中点为M,C、D两点为曲线E上关于原点O对称的两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68a772d5f6bc623f3978f96a9749689.png)
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【推荐2】已知椭圆C的中心在原点,焦点在x轴上,离心率为
,短轴长为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/2d50f4f1-6334-43d4-9b5d-01e527996cda.png?resizew=208)
(1)求椭圆C的标准方程
(2)直线
与椭圆C交于P、Q两点,A,B是椭圆C上位于直线PQ两侧的动点,且直线AB的斜率为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
①求四边形APBQ的面积的最大值
②设直线PA的斜率为
,直线PB的斜率为
,判断
的值是否为常数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/2d50f4f1-6334-43d4-9b5d-01e527996cda.png?resizew=208)
(1)求椭圆C的标准方程
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
①求四边形APBQ的面积的最大值
②设直线PA的斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
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