已知椭圆
的左、右焦点分别为
,
,上、下顶点分别为
,
,且四边形
是面积为8的正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/641272b8-5b04-481d-87dd-bb47f5084c90.png?resizew=159)
(1)求C的标准方程;
(2)M,N为C上且在x轴上方的两点,
,
与
的交点为P,试问
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/3324199c6751f2e0e6d8542783b0d957.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/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34c0b2434f080f2187a1722f3c00b22.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/641272b8-5b04-481d-87dd-bb47f5084c90.png?resizew=159)
(1)求C的标准方程;
(2)M,N为C上且在x轴上方的两点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b615e1ebbd099d0b77d9f7fd0de86c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183b6a0cef4256c9696a5bca31053da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90a03b11a51bd7824aa4094526e5aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762d2c5304d4b9a6867a359dbecb0956.png)
23-24高二上·山东日照·期中 查看更多[2]
更新时间:2023-11-23 20:58:03
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】已知椭圆
的离心率为
,
,
分别为椭圆的左、右焦点,P为椭圆的下顶点,且
的面积为4.
(1)求椭圆C的方程:
(2)圆
,点A,B分别是椭圆C和圆
上位于y轴右侧的动点,且直线PB的斜率是直线PA的斜率的2倍,求证:直线AB恒过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.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/002ed1ebb2cb936e10ab478789f91c7c.png)
(1)求椭圆C的方程:
(2)圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e25b317906ca42ab1c73779cb462ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知椭圆
的右焦点为F,上顶点为M,O为坐标原点,若
的面积为
,且椭圆的离心率为
.
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988381288013824/2990119940636672/STEM/40bb97b6-2a3a-426f-a394-12c3c328ee36.png?resizew=220)
(1)求椭圆的方程;
(2)是否存在直线l交椭圆于P,Q两点,且F点恰为
的垂心?若存在,求出直线l的方程;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8c3b743769d19231c2165ec275bab1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988381288013824/2990119940636672/STEM/40bb97b6-2a3a-426f-a394-12c3c328ee36.png?resizew=220)
(1)求椭圆的方程;
(2)是否存在直线l交椭圆于P,Q两点,且F点恰为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99675fa03da205c4499967c9d908412.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知
为椭圆
上的一个动点,弦
,
分别过左右焦点
,
,且当线段
的中点在
轴上时,
.
(1)求该椭圆的离心率;
(2)设
,
,试判断
是否为定值?若是定值,求出该定值,并给出证明;若不是定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/cabea664e61863b3b3279dbce607924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93a5acd9dc20e5d954832357395860d.png)
(1)求该椭圆的离心率;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c803e0021b749f431dbad06ae1e8b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f1384f24f9182abd83d97cd32545f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32705e629d8b9187b53efeee6605af15.png)
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【推荐2】已知点
是圆
:
上任意一点,点
的坐标为
,线段
的垂直平分线交直线
于点
,当点
在圆
上运动时,点
的轨迹为
.
(1)求轨迹
的方程;
(2)在
轴上是否存在一定点
,使得双曲线
的任意一条过
的弦
,
为定值?若存在,求出定点和定值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ea11f4c35102fe54e3ec3737a46405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求轨迹
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db17d16ca5121a125992c95bd35ff043.png)
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