1 . 在
中,
,
,
为
边的中线,
为
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645ce289c7cd2c004a200cfe5372d36b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ece8b2caad657f29ad830d78abd54a66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1af98f1fb74e141fe4652c337f27bc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645ce289c7cd2c004a200cfe5372d36b.png)
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名校
2 . 如图,在菱形
中,
分别是边
的中点,
与
交于点
,设
.
表示
;
(2)求
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d103d102b41c3b4960068257a48c2f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dfdbbc32d83b85bf7725dbb320ca09e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33da308d92e9589e211ca612b3c7da76.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
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2024·全国·模拟预测
名校
3 . 梯形
中,
,
,
,
与
交于点
,点
在线段
上,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf832217cee8a4b9acad0531714fb91d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() |
B.![]() |
C.![]() |
D.若![]() ![]() ![]() |
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名校
解题方法
4 . 在平面四边形
中,
,
分别为
,
的中点.若
,
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d118bda04c65961ebe6a2296de4cddca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61fe0a2c9932ab756d121e93313be427.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-06更新
|
2429次组卷
|
11卷引用:湖南省长沙市2024届高三上学期新高考适应性考试数学试卷
湖南省长沙市2024届高三上学期新高考适应性考试数学试卷(已下线)第六套 复盘提升卷(已下线)热点4-2 平面向量的数量积及应用(6题型+满分技巧+限时检测)重庆市南开中学校2023-2024学年高一下学期阶段测试数学试题(已下线)黄金卷04(2024新题型)江西省宜春市宜丰中学2023-2024学年高二下学期3月月考数学试题(已下线)2.5 从力的做功到向量的数量积-同步精品课堂(北师大版2019必修第二册)(已下线)6.3.1 平面向量基本定理——课后作业(基础版)河南省信阳市新县高级中学2024届高三下学期3月适应性考试数学试题云南省昆明市第一中学2023-2024学年高一下学期期中考试数学试卷广东省广州市执信中学2024届高三下学期教学情况检测(一)数学试题
名校
5 .
中,
为
上一点且满足
,若
为
上一点,且满足
为正实数,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a1c64cc287f3c0445dea376dee9faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171c26b2af6d379af7c1b2467320aa7.png)
A.![]() ![]() | B.![]() |
C.![]() | D.![]() |
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2023-10-04更新
|
1683次组卷
|
7卷引用:湖南师范大学附属中学2024届高三上学期月考(二)数学试题
湖南师范大学附属中学2024届高三上学期月考(二)数学试题广西南宁市第三中学2024届高三10月月考数学试题(已下线)模块一 专题5 平面向量与复数(1)(人教A)广东省广州市天河区广州天省实验学校2023 -2024学年高三上学期中段质量检测数学试题(已下线)第6章 平面向量初步-【优化数学】单元测试基础卷(人教B版2019)(已下线)重难点4-1 平面向量的最值与范围(4题型+满分技巧+限时检测)(已下线)专题04 平面向量(解密讲义)
名校
解题方法
6 . 如图,
中,
为
边的中点,
为线段
上的任意一点(不含
,
),且
,(x,
),若
恒成立,则实数a的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8954ac84d5a64358d2876a62f2a439b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cccdff49c3efe6e7a7dbbf69db9319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9603f85e32df59fbfb0c8b0b831dcd75.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/28/d0a32124-e65d-48a5-9635-55f5348d1f34.png?resizew=194)
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名校
7 . 如图,在
中,点
是边
上一点且
,
是边
的中点,直线
和直线
交于点
,若
是
的平分线,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaedfdfbe695cff948057a17d9caa86c.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d6ceed6e5a36193bcb5a557853dbee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaedfdfbe695cff948057a17d9caa86c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/6/4121f023-55cb-4ef2-9c37-b9dfe1c13e11.png?resizew=191)
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8 . 如图,
中
,AD为BC边上的中线,点E,F分别为边
上的动点,线段EF交AD于G,且线段AE与线段AF的长度乘积为1.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/c9473bae-14d4-4ba5-a27a-1255b26e97db.png?resizew=215)
(1)已知
,请用
表示
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f171bfea8fdad5cc79f7bfdbc0850c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/c9473bae-14d4-4ba5-a27a-1255b26e97db.png?resizew=215)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc39144b305c67d44410d41053a1d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0be656083580a03c6481fb75881b84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538c1a9e933bc1e29d785eeda9cd1abc.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e26b3b7e7293a85fa650b57cedba871.png)
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2023-05-12更新
|
542次组卷
|
2卷引用:湖南省长沙市雅礼中学2022-2023学年高一下学期5月第三次月考数学试题
名校
9 . 已知
是椭圆
的左、右焦点,
为椭圆的上顶点,
在
轴上,
,且
.若坐标原点
到直线
的距离为3,则椭圆
的标准方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786bd647ef52e29c6ba9c65624dafa4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b9c284d566596d2f4fb8471e3e3b6c.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/c5db41a1f31d6baee7c69990811edb9f.png)
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10 . 如图所示,点
是
所在平面上一点,并且满足
,已知
,
,
.
(1)若
是
的外心,求
、
的值;
(2)如果
是
的平分线上某点,则当
达到最小值时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26973a2c6430a75e21a970da9dbf50d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/29/a0db775c-296c-462b-a103-09ce3b71f915.png?resizew=97)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcba53f5ec39e5315c2db3ea2a7fbae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c31ec3c84dc39e96d0413edfbbbb5c7.png)
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