1 . 给出下列命题,其中不正确的命题为( )
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.非零向量![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2019-12-26更新
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2180次组卷
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4卷引用:江苏省徐州市侯集高级中学2019-2020学年高二上学期期末数学试题
江苏省徐州市侯集高级中学2019-2020学年高二上学期期末数学试题(已下线)专题10 空间向量与立体几何-备战2020年新高考数学新题型之【多选题】-《2020年新高考政策解读与配套资源》(已下线)6.1.3共面向量定理(2)湖南省郴州市明星高级中学2023-2024学年高二上学期第一次月考数学试题
2 . 在平面直角坐标系xOy中,已知椭圆
1(a>b>0)的右顶点为(2,0),离心率为
,P是直线x=4上任一点,过点M(1,0)且与PM垂直的直线交椭圆于A,B两点.
(1)求椭圆的方程;
(2)若P点的坐标为(4,3),求弦AB的长度;
(3)设直线PA,PM,PB的斜率分别为k1,k2,k3,问:是否存在常数λ,使得k1+k3=λk2?若存在,求出λ的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22ecb9b0a87ab5098571bdf80441231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9c6fe12d3a9727e00ef87a630302ab.png)
(1)求椭圆的方程;
(2)若P点的坐标为(4,3),求弦AB的长度;
(3)设直线PA,PM,PB的斜率分别为k1,k2,k3,问:是否存在常数λ,使得k1+k3=λk2?若存在,求出λ的值;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/eb1974fb-db6a-48a0-afa4-a1daf1e0d139.png?resizew=235)
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3 . 已知
内接于抛物线
,其中O为原点,若此内接三角形的垂心恰为抛物线的焦点,则
的外接圆方程为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
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2019-09-18更新
|
1429次组卷
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5卷引用:江苏省天一中学2018-2019学年高一下学期期末考试数学试题
江苏省天一中学2018-2019学年高一下学期期末考试数学试题(已下线)专题26 《圆锥曲线与方程》中的三角形四心问题-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册) (已下线)专题27 圆锥曲线与四心问题 微点4 圆锥曲线与垂心问题(已下线)专题30 圆锥曲线与四心问题4种常见考法归类 - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)(已下线)专题8 圆锥曲线与三角形四心问题【练】(压轴小题大全)
4 . 如图,在三棱锥
中,
,
为
的中点,
平面
,垂足
落在线段
上,
为
的重心,已知
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/9989fe13-805f-4c16-81c3-a6eb5dfd3b39.png?resizew=179)
(1)证明:
平面
;
(2)求异面直线
与
所成角的余弦值;
(3)设点
在线段
上,使得
,试确定
的值,使得二面角
为直二面角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deae57d07054a06b33749895b1540b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e9f0780ca00e9ae5828038d25b9661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b013d2a534c22cbcae05549fe54e0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70834818750d0454474ac7c357cd287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cd2bf7c88e24c91625e0f20ba2a4bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/9989fe13-805f-4c16-81c3-a6eb5dfd3b39.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a04ea8ebc597fd1f5d6bb8df181a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36957cc47e8b85809737f005345fd619.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4fce8e923062b9779553d6f282895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c83efc25ec407b5fddf95ba33691e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f45c7733405e33ab597a2116ae363cf.png)
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5 . 如图,已知点
是椭圆
上的任意一点,直线
与椭圆交于
,
两点,直线
,
的斜率都存在.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/d6cfe5eb-5842-4726-8b75-786d7252f716.png?resizew=183)
(1)若直线
过原点,求证:
为定值;
(2)若直线
不过原点,且
,试探究
是否为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/d6cfe5eb-5842-4726-8b75-786d7252f716.png?resizew=183)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5702feefd657c2987d3fe5d9884f2d0.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ec52d0ca60bf71503a639b95b6ccab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5702feefd657c2987d3fe5d9884f2d0.png)
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6 . 如图,在平面直角坐标系
中,已知椭圆
的离心率为
,点
在椭圆
上.
![](https://img.xkw.com/dksih/QBM/2019/7/10/2243758060814336/2243799791837184/STEM/89c4369c27c04771933406ae7f82cc71.png?resizew=282)
(1)求椭圆
的标准方程;
(2)设直线
与圆
相切,与椭圆
相交于
两点.
①若直线
过椭圆
的右焦点
,且与圆
切于第一象限,求
的面积;
②求证:
的值为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](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/80991c1f0c963104740e50cfff6f29a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2019/7/10/2243758060814336/2243799791837184/STEM/89c4369c27c04771933406ae7f82cc71.png?resizew=282)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b33328faae2d2d4921900e97424de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
①若直线
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45b8b000c9c286bff8a480dbf03b513.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f53194dfeab1498f68ad90a48e0926.png)
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解题方法
7 . 如图,已知椭圆
与椭圆
的离心率相同.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/2229450d-2e2c-4e79-a7f9-0b3d025161f8.png?resizew=250)
(1)求
的值;
(2)过椭圆
的左顶点
作直线
,交椭圆
于另一点
,交椭圆
于
两点(点
在
之间).①求
面积的最大值(
为坐标原点);②设
的中点为
,椭圆
的右顶点为
,直线
与直线
的交点为
,试探究点
是否在某一条定直线上运动,若是,求出该直线方程;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a85ea0f01db96f4dbea378ee3d9596f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9513e6ac7c645d722f794dfe758c5a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/2229450d-2e2c-4e79-a7f9-0b3d025161f8.png?resizew=250)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)过椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54ea1c0c4903b3222aad364b52b5f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45b8b000c9c286bff8a480dbf03b513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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8 . 如图,在平面直角坐标系xOy中,已知抛物线
的焦点为F,准线与x轴的交点为H,过点F的直线l与抛物线的交点为A,B,且
.
求证:
;
求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661bd8d4d82205bd311e7349ae91f602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19525606adc4a20afdadbc38a1f195a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a4bc86f1590550f5c4de5b98a8ceafd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb6a7c8fcb371b2124abcabcb374d88.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/60c133c1-a044-4f14-8a31-94496e1a3292.png?resizew=147)
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9 . 如图,椭圆C:
的顶点分别为
,
,
,
,记四边形
的面积为
,四边形
的内切圆面积为
,若
,则椭圆C的离心率的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/035a5a88e7e2d6ef2b47d992412a1f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb960b00b7d4985d659b62eb74f470a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ed513f56811aa1d314514c5c10d90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef3c9dd64ecdf6d1fc3ab081aeb6a23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4925f7caf9fb69c7cf3b4375275aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701e8fe74f0afb74b16fc977fed34d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4925f7caf9fb69c7cf3b4375275aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84f27e920fe12854e85c6aa2533a8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902670558f2dff6db291c81592cafa28.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/f12e473c-51f2-450f-80c3-9de82cb8298d.png?resizew=174)
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2019-03-18更新
|
457次组卷
|
2卷引用:【市级联考】江苏省海门市2018-2019学年高二上学期期末联考数学(理)试题
10 . 已知椭圆C:
的离心率为
,经过点
过点
的直线l与椭圆C相交于A,B两点,且与椭圆C的左准线交于点N.
求椭圆C的标准方程;
当
时,求直线l的方程;
设
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc860cece09bffcc2593dc7b11aee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84e44a894bd590abeecf4219144e836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a314a533f9cbac7decd9dc155d8d33f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052523a693e59f182018b8ad9dee7375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4bbf7acc38d391682378a7509dc04d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703b40a6293ed9e33001e2919379b168.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/d7538541-6f3e-497a-af17-26d6692d8b1f.png?resizew=218)
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