1 . 椭圆
的离心率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 如图,已知抛物线
与
轴相交于点
,
两点,
是该抛物线上位于第一象限内的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/4c951471-66ed-4130-9e67-ba6e6422d5c7.png?resizew=190)
(Ⅰ) 记直线
的斜率分别为
,求证:
为定值;
(Ⅱ)过点
作
,垂足为
.若
关于
轴的对称点恰好在直线
上,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c184c17e35b98fe8094cebe9522e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/4c951471-66ed-4130-9e67-ba6e6422d5c7.png?resizew=190)
(Ⅰ) 记直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180e70ec47e578366cca62df61290460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29212e455dd6df5379ae67f379a32158.png)
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
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3 . 如图,直线
不与坐标轴垂直,且与抛物线
有且只有一个公共点
.
![](https://img.xkw.com/dksih/QBM/2020/3/12/2418132617650176/2418680251908096/STEM/64754c8b69fd4b32ad37af71dec85397.png?resizew=145)
(1)当点
的坐标为
时,求直线
的方程;
(2)设直线
与
轴的交点为
,过点
且与直线
垂直的直线
交抛物线
于
,
两点.当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159a2d4945049c5a8f525f18763eba91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/3/12/2418132617650176/2418680251908096/STEM/64754c8b69fd4b32ad37af71dec85397.png?resizew=145)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c832f2474efe89961ef41e884da7660c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705c50d8b70f124e215d23b8403faacb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2020-03-13更新
|
512次组卷
|
3卷引用:浙江省2018年6月普通高中学业水平考试数学试题2
解题方法
4 . 如图,
,
分别为椭圆
的右顶点和上顶点,
为坐标原点,
为线段
的中点,
为
在
上的射影,若
平分
,则该椭圆的离心率为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/203e4ccd-87d5-4fd5-85f7-eb22a5e51fbb.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae27fa5473541698781d6da0776b133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d9b4e3d965c88f9f7c3b8c97129649.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/203e4ccd-87d5-4fd5-85f7-eb22a5e51fbb.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-13更新
|
578次组卷
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4卷引用:浙江省2018年6月普通高中学业水平考试数学试题2
5 . 双曲线
的焦点坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a0bd4bd9985f1e367c100b453ed03f.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2020-03-13更新
|
298次组卷
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3卷引用:浙江省2018年6月普通高中学业水平考试数学试题2
6 . 已知抛物线C:
,焦点为
,点
在抛物线C上,设
,其中
.
(Ⅰ)求焦点
的坐标;
(Ⅱ)求证:直线
与抛物线C相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00783bc22702fa2e24b3f4a259fe6ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b8e0e181de2dfa47561cc534287eed.png)
(Ⅰ)求焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(Ⅱ)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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7 . 椭圆
的离心率是___________ ,焦距长是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
您最近一年使用:0次
2020-02-28更新
|
550次组卷
|
4卷引用:2019年浙江省普通高中学业水平冲A卷(二)
2019年浙江省普通高中学业水平冲A卷(二)(已下线)专题3.4《圆锥曲线的方程》单元测试卷(A卷基础篇)-2020-2021学年高二数学选择性必修第一册同步单元AB卷(新教材人教A版,浙江专用)浙江省丽水外国语学校高中部2021-2022学年高二上学期10月第一次月考数学试题2019届浙江省丽水、湖州、衢州市高三上学期期末数学试题
8 . 设
,
分别是双曲线
的左、右焦点.若双曲线上存在一点
,使得
,且
,则该双曲线的离心率是( )
![](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/c59f8afa4c99e0fc6210cf98646f0ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbbd216b473c4fb368f998181884bc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d124b231bf2cd3746f35e6c68cd7178f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-02-12更新
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2卷引用:2020年1月浙江省普通高校招生学业水平考试数学试题
名校
9 . 椭圆
的焦点坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b747db7eaf469c6d1607e4b0d028299f.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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|
884次组卷
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4卷引用:2020年1月浙江省普通高校招生学业水平考试数学试题
名校
10 . 抛物线
的焦点到其准线的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
A.![]() | B.![]() | C.1 | D.2 |
您最近一年使用:0次
2020-01-28更新
|
609次组卷
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5卷引用:2015年6月浙江省普通高中学业水平模拟测试数学试卷