1 . 在
中,
,
,
,
为
所在平面内一点,且
,若
,则当
取得最大值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896b39beb50a8e7008ba3aa37a15036d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1dd07c0571772e96d318f974724810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810fee760e06028fb7d37e65db79bfa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e8c20034fbc46b00bc8b419234577a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adebff9fb726cd58eda1ef994890901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896b39beb50a8e7008ba3aa37a15036d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-12-12更新
|
386次组卷
|
2卷引用:贵州省贵阳市2019-2020学年高二上学期联合考试数学(文科)试题
名校
解题方法
2 . 如图,在平行四边形
中,
分别是
上的点,且满
,记
,
,试以
为平面向量的一组基底.利用向量的有关知识解决下列问题;
![](https://img.xkw.com/dksih/QBM/2020/7/29/2516360125579264/2516873955368960/STEM/d47b39b681d4478ca94de5f339131977.png?resizew=210)
(1)用
来表示向量
;
(2)若
,且
,求
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514e17265d4ca55292afc778c1af5f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1a66d823bd84e61672a70883777dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac265febbf99dccf51aa0a2253e61f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44a918c7cfd942d3a53e584c26685a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://img.xkw.com/dksih/QBM/2020/7/29/2516360125579264/2516873955368960/STEM/d47b39b681d4478ca94de5f339131977.png?resizew=210)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/205b7476ab0bad9c1e79ef0c74dbd703.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb257602272daf404fe9182917445ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d94957da646d35d0dbd29b756d1f6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a15b545de262d0b1a3beef0e7208427.png)
您最近一年使用:0次
2020-07-30更新
|
373次组卷
|
8卷引用:浙江省绍兴市诸暨中学2019-2020学年高二(平行班)下学期期中数学试题
浙江省绍兴市诸暨中学2019-2020学年高二(平行班)下学期期中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(文)试题福建省福州市八县(市)一中(福清一中,长乐一中等)2016-2017学年高一下学期期末联考数学试题【校级联考】福建省福州市八县(市)协作校2018-2019学年高一上学期期末联考数学试题人教A版(2019) 必修第二册 逆袭之路 第六章 6.2.4 向量的数量积安徽省部分省示范中学2018-2019学年高一下学期期中数学试题湖南省娄底市第一中学2019-2020学年高一下学期期末数学试题(已下线)6.3 平面向量的基本定理及坐标表示-2020-2021高中数学新教材配套提升训练(人教A版必修第二册)
名校
3 . 在
中,
,
,
,点O为
所在平面上一点,满足
(
且
).
(1)证明:
;
(2)若点O为
的重心,求m、n的值;
(3)若点O为
的外心,求m、n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edeb12d08bc43eaa3dfc9b17068902f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26927f1f0be044942dfce30c3607158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d100f6eb4bfc0b0191c12d5ab35d0d.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f5f5078bc2acc3626bd09c234d42b9b.png)
(2)若点O为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(3)若点O为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
2019-12-11更新
|
804次组卷
|
7卷引用:上海市七宝中学2019-2020学年高二上学期期中数学试题
上海市七宝中学2019-2020学年高二上学期期中数学试题上海市青浦高中2020-2021学年高二上学期10月月考数学试题上海市实验学校2020-2021学年高二上学期期中数学试题(已下线)9.4 向量应用 2020-2021学年高一数学同步课堂帮帮帮(苏教版2019必修第二册)江苏省宿迁市第一中学2022-2023学年高一下学期3月阶段模拟数学试题(已下线)高一下学期期中复习解答题压轴题十八大题型专练(1)-举一反三系列(人教A版2019必修第二册)(已下线)高一下学期期末复习解答题压轴题二十四大题型专练(1)-举一反三系列(人教A版2019必修第二册)
12-13高三·四川内江·阶段练习
名校
4 . 如图,菱形
的边长为2,
,
为
的中,若点
为菱形内任意一点(含边界),则
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd92ed9c7d216873545ea59101b6ce1b.png)
![](https://img.xkw.com/dksih/QBM/2021/3/21/2682911444271104/2686044187729920/STEM/b524c75b07b64cf893553aa270fbc53e.png?resizew=182)
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2021-03-26更新
|
249次组卷
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9卷引用:重庆市綦江区南州中学高2019届高二下第三学月考试理科数学试题
重庆市綦江区南州中学高2019届高二下第三学月考试理科数学试题(已下线)2014届四川省内江六中高三第三次月考理科数学试卷(已下线)2015届福建省惠安一中等三校高三上学期期中联考文科数学试卷2015届湖北省襄阳市第五中学高三第一学期11月质检理科数学试卷【全国百强校】江西省南昌市第十中学2019届高三上学期期中考试数学(理)试题河南省南阳市第一中学校2019-2020学年高三上学期12月月考数学(文)试题江苏省南京市第二十九中学2020-2021学年高一下学期3月月考数学试题江苏省盐城市阜宁县2020-2021学年高一下学期期中数学试题宁夏回族自治区石嘴山市第三中学2022-2023学年高一下学期第一次月考数学试题
5 . 已知
若以
与
为一组基底,则用
与
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94bfe7d8795180fbb0a19ed991b3d646.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ecc2c35d19dd64d9a0c45d3f3700a1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94bfe7d8795180fbb0a19ed991b3d646.png)
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6 . 如图,矩形
中,
为边
的中点,
为边
的中点,
设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90330ec16a0f858a272a88bf9c5feb43.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/b38717a0-eb1c-4b16-aa9b-58942558a2db.png?resizew=108)
(1)试用
和
表示两个向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4beb0a2edd6b863b28e024429cf2816a.png)
(2)求两个向量
的夹角的大小(用反三角函数值表示).
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed8438b77668f53e77d864690ca99b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90330ec16a0f858a272a88bf9c5feb43.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/b38717a0-eb1c-4b16-aa9b-58942558a2db.png?resizew=108)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4beb0a2edd6b863b28e024429cf2816a.png)
(2)求两个向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a9cd15746330fba739c4da82e42f84.png)
您最近一年使用:0次
7 . 如图,
,点
在由射线
、线段
及
的延长线围成的区域内(不含边界)运动,且
.当
时,
的取值范围是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/ab89d255-b9de-4fa4-a511-752b0b089a37.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/656be0d1bba470903a0bc0784ff8281f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d093706141016f4e2fde905738cd481e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c98a7f3a8bf384b1dfc1d34aebd46d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/ab89d255-b9de-4fa4-a511-752b0b089a37.png?resizew=160)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
8 . 在
中,
,边
的中点分别是
,若
.
(1)分别用
表示
和
;
(2)求
所成钝角的大小(结果用反三角函数表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d622485f4dfbc4cb2c30a4f4c93bb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b54ebeaf1cfd4d5ab8f911edde4aa26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b5c978211df9efb4ad6a28118c3d4d.png)
(1)分别用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d0cd8afb922d59fd4609d33b4d014c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cd646d4b98562e40bb71700271040c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30282876c813f0ac7b6203ba623f37f7.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15204b24dd62067316fee9abab2bf73.png)
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名校
解题方法
9 . 在平面直角坐标系中,四边形ABCD是平行四边形,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2714c95b28ade4d8b52885c5a893b59.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2d0cedd559c80b64815a207bb93cec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b20184e3d3585a734928542e18509fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2714c95b28ade4d8b52885c5a893b59.png)
您最近一年使用:0次
2020-03-28更新
|
195次组卷
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4卷引用:安徽省六安市舒城中学2017-2018学年高二下学期第一次统考(开学考试)数学(文)试题
10 . 已知
中,
,延长
交
于
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe6df405a5230cec9b8717407d8e7986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b385329fa0199e30da2ccfdf559ebf70.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-12-01更新
|
343次组卷
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2卷引用:云南省临沧市沧源县民族中学2020-2021学年高二12月月考数学试题