1 . 已知平面上四个互异的点
、
、
、
满足:
,则
的形状一定是
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53931d445a44b67b1343021a1fac171d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.等边三角形 | B.直角三角形 | C.等腰三角形 | D.钝角三角形 |
您最近一年使用:0次
2 . 已知向量
,则
与
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70d3340e78f2a1b4a61161d8cca36aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
A.垂直 | B.不垂直也不平行 | C.平行且同向 | D.平行且反向 |
您最近一年使用:0次
2019-09-13更新
|
440次组卷
|
3卷引用:福建省南平市2018-2019学年高一下学期期末质量检测数学试题
名校
解题方法
3 . 已知向量
若变量
满足约束条件
,则
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc431551ec40d2e943c3cec804fe303b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76089c62322bcd65b631562046809b74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 已知向量
与
的夹角为
,且
,
.
(1)求
;
(2)若
,求
值.
![](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/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf0b40ab957abd03f1db03ddf71242fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285a78e061d318c724971ce7def2d8dc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe0f1b843a8508cb96c150413d8bdd7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bf5c633351ce759763d9c5624a7bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
5 . 已知
是非零向量,若
,且
,则
与
的夹角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd8a503b90e3b576be77d9b4565bdec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b9c40deebc1f923a1820c2a6c6e93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
6 . 已知向量
,
,若
,则
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8512918dc4e9e8af6a8d9ef5b8bb09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ab5f93cd89ae2800ce9be4010c1942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c3e2215eeeacdd0a093fa13adf9469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
您最近一年使用:0次
2019-07-17更新
|
333次组卷
|
2卷引用:【市级联考】湖南省衡阳市2019届高三第三次联考(三模)(理)数学试题
7 . 已知非零向量
,
,
满足:
,且不等式
恒成立,则实数
的最大值为__________ .
![](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/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41f48b124d567bd97b70a3e5f7a1ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac52df4643a727b8da4c3a398c072118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2019-07-11更新
|
2110次组卷
|
4卷引用:浙江省慈溪市2018-2019学年高二第二学期期末数学试题
浙江省慈溪市2018-2019学年高二第二学期期末数学试题浙江省慈溪市2018-2019学年高二下学期期末数学试题(已下线)07练-冲刺2020年高考数学小题狂刷卷(浙江专用)浙江省温州市乐清市知临中学2021-2022学年高二下学期期中数学试题
8 . 已知向量
与
不共线,且
,
.
(1)若
与
的夹角为
,求
;
(2)若向量
与
互相垂直,求
的值.
![](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/28280aaac77be24aa72379e49b6f01e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459b84065e210c3ba8181a0c23255b79.png)
(1)若
![](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/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b8b63ccf6958e4d13de65819c2513b.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea1f268299d57e5362182760a5961af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7d66cb1dae19ae455c49fa4dee64ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-07-10更新
|
1023次组卷
|
2卷引用:福建省莆田六中、四中2018-2019学年高一下学期期中数学试题
解题方法
9 . 向量
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378ed93b8b0e0c4df60cad7ed43e131d.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d620e79580bf3210faf0860e39073148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd13da34c935206c6db79e15a274cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378ed93b8b0e0c4df60cad7ed43e131d.png)
您最近一年使用:0次
2019-07-07更新
|
425次组卷
|
2卷引用:安徽省滁州市2018-2019学年高二第一学期期末联考(理科)数学试题
名校
10 . 已知向量
满足
,
,且
,则
与
的夹角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f089a9e08ceb59cb58d7a5be2f62e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285a78e061d318c724971ce7def2d8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07089d133413ca5bf9179b6e7a59994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27c54ede40a05ae5ac34e8afeac5b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-07-05更新
|
685次组卷
|
5卷引用:湖南师范大学附属中学2018-2019学年高一下学期期中数学试题
湖南师范大学附属中学2018-2019学年高一下学期期中数学试题(已下线)专题5.3 平面向量的数量积(练)【理】—《2020年高考一轮复习讲练测》广东省佛山市北外附校三水外国语学校2022-2023学年高一下学期期中数学试题(已下线)复习专题02平面向量的数量积运算(1)-期末专项复习湖北省黄冈市黄梅国际育才高级中学2023-2024学年高二上学期开学验收考试数学试题