名校
1 . 在平面直角坐标系xOy中,已知椭圆E:
(a>b>0)的左、右焦点分别为F1,F2,离心率为
.点P是椭圆上的一动点,且P在第一象限.记
的面积为S,当
时,
.
(1)求椭圆E的标准方程;
(2)如图,PF1,PF2的延长线分别交椭圆于点M, N,记
和
的面积分别为S1和S2.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897740520603648/2905826307293184/STEM/33499ec4e5d345c2a93a798ddb82350a.png?resizew=372)
(i)求证:存在常数λ,使得
成立;
(ii)求S2- S1的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709dd83332fdd081a71c83c83215ecf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2dfb22c6f1c155747100e7536cd1abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a87630cc4a969ccd0e4f8aeb5ff6588.png)
(1)求椭圆E的标准方程;
(2)如图,PF1,PF2的延长线分别交椭圆于点M, N,记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90c19c80e3cae271b3c9813ec19ccac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6b806c433169d8cc79ffea3425e143.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897740520603648/2905826307293184/STEM/33499ec4e5d345c2a93a798ddb82350a.png?resizew=372)
(i)求证:存在常数λ,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2882623cba378bd66d6b7859d24c5f0f.png)
(ii)求S2- S1的最大值.
您最近一年使用:0次
2022-01-30更新
|
836次组卷
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4卷引用:江苏省无锡市江阴市第一中学2021-2022学年高二下学期寒假开学测试数学试题
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解题方法
2 . 已知椭圆
,四点
,
中恰有三点在椭圆
上.
(1)求椭圆
的方程:
(2)已知直线
与椭圆
有两个不同的交点
为
轴上一点,是否存在实数
,使得
是以
为直角顶点的等腰直角三角形?若存在,求出
值及点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8d4cd6375832caa6937d9ddc88d243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6972399c1a4d48231291a468a44c3d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65183d238c9bc2be73770717d890683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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2021-05-27更新
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679次组卷
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2卷引用:江苏省无锡市市北高级中学2021-2022学年高三上学期期初检测数学试题
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3 . 下列选项中,p是q的必要不充分条件的是( )
A.p:3<m<7;q:方程![]() |
B.p:a≥8;q:对∀x∈[1,3]不等式x2﹣a≤0恒成立 |
C.设{an}是首项为正数的等比数列,p:公比小于0;q:对任意的正整数n,a2n﹣1+a2n<0 |
D.已知空间向量![]() ![]() ![]() ![]() ![]() |
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2020-12-10更新
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1473次组卷
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7卷引用:江苏省无锡市梅村高级中学2020-2021学年高三上学期期初检测数学试题
江苏省无锡市梅村高级中学2020-2021学年高三上学期期初检测数学试题山东省泰安市2019-2020学年高二上学期期末数学试题(已下线)专题01 集合与常用逻辑用语-2020年新高考新题型多项选择题专项训练(已下线)第01章+集合与常用逻辑用语(B卷提高篇)-2020-2021学年高一数学必修第一册同步单元AB卷(新教材人教A版)(已下线)专题1.2 常用逻辑用语-备战2021年高考数学精选考点专项突破题集(新高考地区)(已下线)第02讲 简易逻辑-备战2023年高考数学一轮复习考点帮(新高考专用)【学科网名师堂】(已下线)1.3集合与常用逻辑用语专项训练
名校
4 . 在平面直角坐标系
中,椭圆E:
(
)的长轴长为4,左准线l的方程为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/e575d02c-657e-469a-9eb1-3fe51654a2e0.png?resizew=211)
(1)求椭圆的标准方程;
(2)直线
过椭圆E的左焦点
,且与椭圆E交于A,B两点.
①若
,求直线
的方程;
②过A作左准线l的垂线,垂足为
,点
,求证:
,B,G三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a089c207e39a24d0d82aa853ac2bbb8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/e575d02c-657e-469a-9eb1-3fe51654a2e0.png?resizew=211)
(1)求椭圆的标准方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d79cbc472097d8905c1f11cfc357b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
②过A作左准线l的垂线,垂足为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d59d82cb961f72864994b5e8454107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
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2020-02-18更新
|
225次组卷
|
2卷引用:江苏省无锡市宜兴市官林中学2020届高三下学期开学考试数学试题
名校
解题方法
5 . 在平面直角坐标系
中,椭圆
:
(
)的离心率为
,焦点到相应准线的距离为
,动直线l与椭圆交于
两点.
(1)求椭圆
的标准方程;
(2)若
,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
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2020-03-26更新
|
711次组卷
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2卷引用:2019届江苏省无锡市第一中学高三下学期2月期初考试数学试题
名校
6 . 如图,椭圆
(
)过点
,其左、右焦点分别为
,离心率
,
是椭圆右准线
上的两个动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/abc4abc9-b5d1-43b0-a37e-42bd4095df37.png?resizew=166)
(1)求椭圆的方程;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dfb290b1a84f670549554a0c988593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ea8b516e7992a59a25d74f913bc63c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/abc4abc9-b5d1-43b0-a37e-42bd4095df37.png?resizew=166)
(1)求椭圆的方程;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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名校
解题方法
7 . 已知直线
与椭圆
:
(
)相交于
两点,且线段
的中点
在直线
:
上,椭圆
的右焦点
关于直线
的对称点在圆
上,则椭圆
的方程是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f52cb58b6bc5d71030463ba7e28134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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