解题方法
1 . 如图,已知
为椭圆
的上焦点,
分别为上,下顶点,过
作直线
与椭圆交于
两点(不与
重合).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/aa3985ec-a02c-42d0-a623-1872f86a7b9b.png?resizew=176)
(1)若
,求直线
的方程;
(2)记直线
与
的斜率分别为
,求证:
为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db9c31b3f5538be8fe107e391b37c961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/aa3985ec-a02c-42d0-a623-1872f86a7b9b.png?resizew=176)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e9c6116c6d559eb721af11cbeb724f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)记直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67351fe10fcfc3f9072eec4c60bfaaa5.png)
您最近一年使用:0次
解题方法
2 . 已知
、
为椭圆C:
的左右顶点,直线
与C交于
两点,直线
和直线
交于点
.
(1)求点
的轨迹方程.
(2)直线l与点
的轨迹交于
两点,直线
的斜率与直线
斜率之比为
,求证以
为直径的圆一定过C的左顶点.
![](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/bf6dba18751d6641f9fa02f5756be97a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668438e15423368cd744445e824d18a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)直线l与点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/443a82723ae5cf11aa917362e7db003f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448eb7d301baa90fe59b05761830f81f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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21-22高二上·上海浦东新·期末
3 . 已知抛物线
的焦点为F,直线l交抛物线于不同的A、B两点.
(1)若直线l的方程为
,求线段AB的长;
(2)若直线l经过点P(-1,0),点A关于x轴的对称点为A',求证:A'、F、B三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
(1)若直线l的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
(2)若直线l经过点P(-1,0),点A关于x轴的对称点为A',求证:A'、F、B三点共线.
您最近一年使用:0次
名校
解题方法
4 . 如图,在平面直角坐标系中,
分别为双曲线Г:
的左、右焦点,点D为线段
的中点,直线MN过点
且与双曲线右支交于
两点,延长MD、ND,分别与双曲线Г交于P、Q两点.
![](https://img.xkw.com/dksih/QBM/2021/12/16/2873675367243776/2876742357467136/STEM/358abcbb-a95a-4f0c-b8e8-023529854af5.png?resizew=211)
(1)已知点
,求点D到直线MN的距离;
(2)求证:
;
(3)若直线MN、PQ的斜率都存在,且依次设为k1、k2.试判断
是否为定值,如果是,请求出
的值;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5848e50805496263d52dcbde9671a89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438b087a3b66f48298b5a944629adb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7d5b7a335fb30a034976287aee9e05.png)
![](https://img.xkw.com/dksih/QBM/2021/12/16/2873675367243776/2876742357467136/STEM/358abcbb-a95a-4f0c-b8e8-023529854af5.png?resizew=211)
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5261c3908257dfc70e84ae8126163e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eab0357b5e80a6fa5b1c51a2f01be14.png)
(3)若直线MN、PQ的斜率都存在,且依次设为k1、k2.试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a3f348a942d468f0d77c0dfbb41d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a3f348a942d468f0d77c0dfbb41d87.png)
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2021-12-20更新
|
1278次组卷
|
5卷引用:上海市闵行区2022届高三上学期一模数学试题
上海市闵行区2022届高三上学期一模数学试题(已下线)重难点05 解析几何-2022年高考数学【热点·重点·难点】专练(新高考专用)(已下线)押全国卷(理科)第20题 圆锥曲线-备战2022年高考数学(理)临考题号押题(全国卷)(已下线)专题19 圆锥曲线 (模拟练)-2上海市向明中学2022-2023学年高二下学期期中数学试题
名校
5 . 若两个椭圆的离心率相等,则称它们为“相似椭圆”.如图,在直角坐标系xOy中,已知椭圆C1:
,A1,A2分别为椭圆C1的左,右顶点.椭圆C2以线段A1A2为短轴且与椭圆C1为“相似椭圆”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/99e807e8-e915-4ac9-aa7d-b7a4d466bdaf.png?resizew=150)
(1)求椭圆
的方程;
(2)设P为椭圆C2上异于A1,A2的任意一点,过P作PQ⊥x轴,垂足为Q,线段PQ交椭圆C1于点H.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c03c6b8d7418edf20f474389971352.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/99e807e8-e915-4ac9-aa7d-b7a4d466bdaf.png?resizew=150)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)设P为椭圆C2上异于A1,A2的任意一点,过P作PQ⊥x轴,垂足为Q,线段PQ交椭圆C1于点H.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d207830ac0ecb10afcb09c7c4921f3.png)
您最近一年使用:0次
2021-12-15更新
|
587次组卷
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3卷引用:河北省衡水市冀州区第一中学2022届高三上学期期末数学试题
6 . 已知椭圆
:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
的上顶点
与下顶点
在直线
:
的两侧,且点
到
的距离是
到
的距离的
倍.
(Ⅰ)求
的值;
(Ⅱ)设
与
交于
,
两点,求证:直线
与
的斜率之和为定值.
![](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/434249d6640b0c1a712d215cf8b83d5c.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2caf6048aa0807d8ba591963ff6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
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2021-09-10更新
|
510次组卷
|
4卷引用:第11讲 椭圆(6大考点)-2022-2023学年高二数学考试满分全攻略(人教A版2019选修第一册)
(已下线)第11讲 椭圆(6大考点)-2022-2023学年高二数学考试满分全攻略(人教A版2019选修第一册)河南省大联考2021-2022学年高三上学期阶段性测试(一)文科数学试题河南省大联考2021-2022学年高三上学期阶段性测试(一)理科数学试题河南省十所名校2021-2022学年高三上学期文科数学阶段性测试(一)
21-22高二上·浙江·期末
解题方法
7 . 已知椭圆
的离心率为
,且过点
,A,B分别为椭圆E的左,右顶点,P为直线
上的动点(不在x轴上),
与椭圆E的另一交点为C,
与椭圆E的另一交点为D,记直线
与
的斜率分别为
,
.
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740933297233920/2740970709590016/STEM/3f18e90c-2a8f-45a1-a2e8-23e451006f49.png?resizew=232)
(Ⅰ)求椭圆E的方程;
(Ⅱ)求
的值;
(Ⅲ)证明:直线
过一个定点,并求出此定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef233ad3db01fa3ce9ee94eaad8e64e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740933297233920/2740970709590016/STEM/3f18e90c-2a8f-45a1-a2e8-23e451006f49.png?resizew=232)
(Ⅰ)求椭圆E的方程;
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67351fe10fcfc3f9072eec4c60bfaaa5.png)
(Ⅲ)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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8 . 已知抛物线
与直线
只有一个公共点,点
是抛物线
上的动点.
(1)求抛物线
的方程;
(2)①若
,求证:直线
过定点;
②若
是抛物线
上与原点不重合的定点,且
,求证:直线
的斜率为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff339352d638e950e580f28a5f6b6214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39978841bdbe3d4d968557f8048f223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2020-06-08更新
|
448次组卷
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4卷引用:第07练 直线与圆锥曲线综合二:定值定点-2022年【寒假分层作业】高二数学(苏教版2019选择性必修第一册)
(已下线)第07练 直线与圆锥曲线综合二:定值定点-2022年【寒假分层作业】高二数学(苏教版2019选择性必修第一册)江西省稳派教育2020届高三下学期调研考试(三)数学(理科)试题江西省稳派教育2020届高三下学期调研考试(三)数学(文科)试题(已下线)【南昌新东方】江西省南昌市豫章中学2020-2021年高三上学期10月第一次月考数学(文)试题
9 . 已知椭圆
的下焦点为
,
与短轴的两个端点构成正三角形,以
(坐标原点)为圆心,
长为半径的圆与直线
相切.
(1)求椭圆
的方程;
(2)设点
为直线
上任意一点,过点
作与直线
垂直的直线
,
交椭圆
于
两点,
的中点为
,求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281c9349efe55d0db7395761fe9dc08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e0f7f6d4b14813f18aa16caca7dbd9.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3481ecc58fb0c27daf08f7735c48d8eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.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/ea52bf7f8fd9b8c250482db53bdf0705.png)
您最近一年使用:0次
2019-05-23更新
|
413次组卷
|
2卷引用:新疆和田地区和田县2022-2023学年高二上学期11月期中教学情况调研数学试题