1 . 化简
(1)
;
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f731955caa9ccea4ac70305ecb111a6b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/830de438a755df10fbcef058c3fbc910.png)
您最近一年使用:0次
2021-09-13更新
|
580次组卷
|
6卷引用:湖南省长沙市湘郡长德实验学校2020-2021学年高一下学期3月月考数学试题
湖南省长沙市湘郡长德实验学校2020-2021学年高一下学期3月月考数学试题广东省河源市龙川宏图学校2021-2022学年高一下学期月考(二)数学试题(已下线)6.2.1 平面向量的线性运算(精讲)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)9.2.2 向量的数乘1(已下线)第02讲 平面向量的运算-《知识解读·题型专练》(人教A版2019必修第二册)(已下线)专题03 向量的数乘(2)-《重难点题型·高分突破》(苏教版2019必修第二册)
2 . 在
中,已知
,
,
.
(1)若
为
边上的中线,求
的长度;
(2)若
平分
,且
点在
上,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
(1)若
![](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/03902478df1a55bc99703210bccab910.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.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)
您最近一年使用:0次
解题方法
3 . 如图,在
中,D是BC的中点,E在边AB上,
,AD与CE交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/fd71fe5d-8b7c-4c84-a9e9-7e86ac3f2f3b.png?resizew=193)
(1)试用向量
,
表示向量
,
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833a1317d15bdad58ca21d3934a9a2b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/fd71fe5d-8b7c-4c84-a9e9-7e86ac3f2f3b.png?resizew=193)
(1)试用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fe5773c35dd7ba9526310a7a154026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7f004f23ec3f968d885cb111aac4e2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e575da6ea6d154d69fe1e5f7f9f9638b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea79586df2029edb34c7cb2f67dc3722.png)
您最近一年使用:0次
2022-07-12更新
|
384次组卷
|
3卷引用:海南省琼海市嘉积第二中学2021-2022学年高一下学期教学质量监测(期末)数学试题
名校
解题方法
4 . (1)化简:
;
(2)设两个非零向量
与
不共线.如果
,
,
,求证:
、
、
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f53ce7a9bd8af9590dca336b30191a.png)
(2)设两个非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b28baf17059c56ee9ad1ae4814acd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b04618e5b2db68f2de6ba68972c505c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a1cefe3d6b5047bb0cb4c244f5c495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e59ff16e2cc2f6f953120b7740fdda0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90f43fda70491b24279dec9f042a098.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/8455657dde27aabe6adb7b188e031c11.png)
您最近一年使用:0次
2020-06-06更新
|
898次组卷
|
3卷引用:宁夏石嘴山市第三中学2019-2020学年高一下学期期中考试数学试题
宁夏石嘴山市第三中学2019-2020学年高一下学期期中考试数学试题内蒙古集宁一中(西校区)2020-2021学年高二上学期第一次月考数学(理)试题(已下线)6.1.4 数乘向量-2020-2021学年高一数学课时同步练(人教B版2019必修第二册)
解题方法
5 . 在四边形
中,
.
(1)若
,证明:四边形
为菱形.
(2)已知
为
的中点,设
,试用
表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ccecb2c6965297b0357d42e53503bf.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbbde58a92570c888ff8f29bf57cb52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)已知
![](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/6504fcbb072ee4c8275f7352c0c4a572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fe7e40356acd24eb908a7f3ab28229.png)
您最近一年使用:0次
2022-07-02更新
|
375次组卷
|
2卷引用:河北省保定市2021-2022学年高一下学期期末数学试题
20-21高一下·浙江·期末
名校
6 . 如图,在平行四边形
中,已知
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/82babed3-c7cd-4464-b26f-0b8377188e58.png?resizew=178)
(1)若
,求m,n的值和向量
的模长;
(2)求
和
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6b76b84f59139b6b11f010498b2bbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db4890cd6b12a71aed8545616eb9d27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82b6e0e0f98101a16ff516b4e4a76aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745ff827a6118373c4c1ca7276c8e64c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/82babed3-c7cd-4464-b26f-0b8377188e58.png?resizew=178)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6327c30d4697fc341a77d544f9b2b2e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b5a51e65e9b56a9970de33ead263a9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b5a51e65e9b56a9970de33ead263a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
您最近一年使用:0次
2021-06-12更新
|
524次组卷
|
4卷引用:【新东方】双师313高一下
名校
7 . 如图,在平行四边形
中,
是
的中点,且
在直线
上,且
,记
,
,若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/35b566af-14c5-453b-8aad-e24c1e38934f.png?resizew=198)
(1)求
的值;
(2)若
,
,且
,求
.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae003c2f9053fab9bf2365c871fa802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b536ac375a0b74e9c7efbc585f987f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4abd10ab43ce90743bd0f79b1f5bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061383d76690158d222c8c508b9ec75e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/35b566af-14c5-453b-8aad-e24c1e38934f.png?resizew=198)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a5ff78b8a63ab3eaba1985591ab459a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7a42341edbc0b01ab0769c4c02c3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37360e5fa7d235f045ad08eede2aa4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4db1a3b51d12f8863a555ba8d1508e.png)
您最近一年使用:0次
2020-09-27更新
|
733次组卷
|
6卷引用:山东省聊城市九校2020-2021学年高二上学期第一次开学联考数学试题
名校
8 . 已知点
是
的重心,点
在边
上,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8488ec91652ad560475f6d45c8e20b.png)
(1)用
和
表示
;
(2)用
和
表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8488ec91652ad560475f6d45c8e20b.png)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670f6533aaf27dd575f4f26e0c5928d9.png)
(2)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660f09edc91a1f08fd43a8fc672c99ea.png)
您最近一年使用:0次
2021-04-20更新
|
475次组卷
|
6卷引用:上海市浦东新区建平中学2018~2019学年高一下期末数学试题
上海市浦东新区建平中学2018~2019学年高一下期末数学试题(已下线)2.3.1 平面向量基本定理-2020-2021学年高一数学课时同步练(人教A版必修4)(已下线)专题2.3 平面向量【专项训练】-2020-2021学年高一数学下学期期末专项复习(沪教版2020)(已下线)6.2.1 平面向量的线性运算(精练)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)第03讲 平面向量的减法运算(2)(已下线)6.2.2向量的减法运算(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)
名校
9 . 点
为
平面上一点,有如下三个结论:
①若
,则点
为
的______;
②若
,则点
为
的______;
③若
,则点
为
的______.
回答以下两个小问:
(1)请你从以下四个选项中分别选出一项,填在相应的横线上.
A. 重心 B. 外心 C. 内心 D. 垂心
(2)请你证明结论②.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6740b373e829124a9f0728a644e829ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5965f05ab9d3d721515717affeaa4d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a074d407b957f752244c9b5a06dc488.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
回答以下两个小问:
(1)请你从以下四个选项中分别选出一项,填在相应的横线上.
A. 重心 B. 外心 C. 内心 D. 垂心
(2)请你证明结论②.
您最近一年使用:0次
10 . 在
中,
是边BC上一点,
,设
.
![](https://img.xkw.com/dksih/QBM/2021/4/15/2700461164052480/2806584285896704/STEM/e366f6c1-c15c-4acb-9cd9-6b9afa1f0ce7.png?resizew=283)
(1)试用
表示
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5753c7e600265950be9197d147cca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59802bde1dc59ba9000157b08463b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43af2c880abda673a39fb3940bc3c67a.png)
![](https://img.xkw.com/dksih/QBM/2021/4/15/2700461164052480/2806584285896704/STEM/e366f6c1-c15c-4acb-9cd9-6b9afa1f0ce7.png?resizew=283)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b5951c412d179599a26adacefecd7ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd98a891fa65f2fc6688001b03185d0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e5f0d86f19fe94f6ac084fbb1bd49d.png)
您最近一年使用:0次