一张坐标纸上涂着圆E:
及点P(1,0),折叠此纸片,使P与圆周上某点P'重合,每次折叠都会留下折痕,设折痕与直线EP'交于点M.
(1)求
的轨迹
的方程;
(2)直线
与C的两个不同交点为A,B,且l与以EP为直径的圆相切,若
,求△ABO的面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c66e89fbb623bba218b16b3672a79c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56640078c2393ac2eab910b956bff600.png)
更新时间:2018-01-19 10:03:04
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【推荐1】在直角坐标系
中,已知椭圆
的上下两个焦点分别为
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.
(1)求椭圆
的标准方程;
(2)设椭圆
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交椭圆
于另一个点
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(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5612d598e27ac2ce0ab89fb63538bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3656055f5256cd06e636ea96e9f89c2.png)
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【推荐2】设椭圆
的左右焦点分别为
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到两焦点的距离之和为
,椭圆的离心率为
.
(1)求椭圆
的方程;
(2)直线
与椭圆
在第一象限交于点
,点
是第四象限的点且在椭圆
上,线段
被直线
垂直平分,直线
与椭圆
交于点
(异于点
),求证直线
的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆
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(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdbd8a5d973b7a54b7605388fdcfbb07.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】已知椭圆C:
的焦距是短轴长的
倍,以椭圆的四个顶点为顶点的四边形周长为
.
(1)求椭圆的方程;
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,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347b68f42934c74e0d759a67613a1da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588c3822b7812e711b4ad86647b15dc1.png)
(1)求椭圆的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5cc88be395d6260493079cee5a7f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab95dcb40ad1b83691f911224b6a292b.png)
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【推荐2】已知命题
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”均为真命题,求实数
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【推荐1】已知椭圆
,点
,
,
分别为椭圆的左焦点、右顶点和下顶点,
的面积为
,且椭圆的离心率为
.
(1)求椭圆的标准方程;
(2)若点
为椭圆
上一点,直线
与椭圆
交于不同的两点
,
,且
(点
为坐标原点),求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆的标准方程;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐2】已知椭圆
的焦距为4,上顶点为A,右焦点为F,原点O到直线AF的距离为
.
(1)求椭圆C的方程;
(2)过点F的直线l与C交于M,N两点,过点M作x轴垂线,垂足为E,过点N作x轴垂线,垂足为Q,QM与NE交于点P,是否存在直线l使得
的面积等于
,若存在求出直线l的方程;若不存在,请说明理由.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
(1)求椭圆C的方程;
(2)过点F的直线l与C交于M,N两点,过点M作x轴垂线,垂足为E,过点N作x轴垂线,垂足为Q,QM与NE交于点P,是否存在直线l使得
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ea07c396a9883d159ce2887ce65466.png)
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