1 . 两个大小相等的共点力
与
,若当它们的夹角为
时合力大小为
,则当它们的夹角为
时合力大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4843c1f662fd4106c3a89c3c1e0538c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
您最近一年使用:0次
2021-12-02更新
|
478次组卷
|
3卷引用:沪教版(2020) 必修第二册 堂堂清 第八章 8.1(2)向量的概念和线性运算
名校
2 . 在
中,给出如下命题:
①
是
所在平面内一定点,且满足
,则
是
的垂心;
②
是
所在平面内一定点,动点
满足
,
,则动点
一定过
的重心;
③
是
内一定点,且
,则
;
④若
且
,则
为等边三角形,
其中正确的命题为_____ (将所有正确命题的序号都填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec09a159d6760fca8ae5966bf97b4e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd38fab7ea8a640f82ff3d2342dd6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddf6ba33629128692e0b8c23100415a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05a266de6e73486d1c04003321c26ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8cfeb3d9af75a2c2a84701d4f0bb87.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5448c2bab910f9a914de6e9609a35c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ec4e396cae9d36d48acecbedac434b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
其中正确的命题为
您最近一年使用:0次
2019-09-11更新
|
774次组卷
|
2卷引用:四川省自贡市2018-2019学年高一下学期期末考试数学(理)试题
名校
3 . 已知菱形ABCD的边长为1,∠B=60°,点E,F分别是边AB,BC的中点,则
的值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab330d1c5cfcd5b5f69545340dc0d01.png)
您最近一年使用:0次
4 . 化简
的结果是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f1732f45c808f327e2e6176372747f9.png)
您最近一年使用:0次
2019-05-17更新
|
699次组卷
|
4卷引用:步步高高一数学暑假作业:作业23 平面向量的线性运算
步步高高一数学暑假作业:作业23 平面向量的线性运算北京市房山中学2021-2022学年高一年级4月月考数学试题(已下线)6.2.2平面向量的运算—加法 减法-【师说智慧课堂】课后训练(人教A版2019)黑龙江省鸡西市第四中学2021-2022学年高一下学期期中考试数学试题
5 . 如图,在
中,若
,
,线段
的中点为
,
的中点为
,
的中点为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1887a1513aee097a396e99d7399c4e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4851948ee018b0cf4e52b04f738f3f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb6fd2fa53b92a03d21f208b74e3857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d815d480c54e0d14d737381baf3c70a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/d6c26c90-24e5-4d44-821a-1263e1734fa6.png?resizew=153)
您最近一年使用:0次
解题方法
6 .
、
均为非零向量,叙述下列等式成立的条件:
(1)
成立的条件是__________ ;
(2)
成立的条件是__________ ;
(3)
成立的条件是__________ ;
(4)
成立的条件是__________ ;
(5)
成立的条件是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fc4cd72b89a33bf68aa756a0c8d013.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca0f4e90da8f0c4beee3a456c3c5038e.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c3b7e26869dbdb5e14936ed20367df.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16da2bc79d4cbf39694006893fb64fff.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480e7839b807ca5c0c6c4028eba6c00c.png)
您最近一年使用:0次
2021-03-25更新
|
326次组卷
|
2卷引用:沪教版(2020) 必修第二册 领航者 第8章 平面向量 8.1向量的概念和线性运算 第2课时 向量的加法和减法
7 . 已知
是直角三角形且
,则在下列结论中正确的是__________ (写出所有正确结论的序号)
①
;②
;
③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8db758effaf070ccb32d48532ae0306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b699c52ba64a088fa72719a02abdefd.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc0d7c2274141602d172528458afc46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa07bd389a95994e02cef6743199f75e.png)
您最近一年使用:0次
8 . 化简:
+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab092d124d51a236fa5e2af7400fdad.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91480dc7ccaa64eecbd60abe3975c713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab092d124d51a236fa5e2af7400fdad.png)
您最近一年使用:0次
2019高一下·全国·专题练习
9 . 如图,在正六边形ABCDEF中,已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7e5c8ad04ceea480e413ef6a6a953b.png)
___________ (用
与
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee72ce4f36a71e410d36eba1fb97037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b01074b444268ca3831da1cd068fe3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7e5c8ad04ceea480e413ef6a6a953b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358d896d9eab84c6695ddc25196e6857.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/0b3a7b17-5f7e-416e-8616-6b624256881b.png?resizew=128)
您最近一年使用:0次
名校
解题方法
10 . 两个大小相等的共点力
,
,当它们的夹角为
时,合力大小为
.当它们的夹角为
时,合力大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce87b3aae5def54ce6484e5315d3f7c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d699e4ab6fc7e4a36a02bcd78ad5e775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a16a556e2acefcc16363f9d331ca65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
您最近一年使用:0次
2020-09-16更新
|
276次组卷
|
6卷引用:高中数学人教A版必修4 第二章 平面向量 2.5.2 向量的应用(2)
高中数学人教A版必修4 第二章 平面向量 2.5.2 向量的应用(2)宁夏六盘山高级中学2019-2020学年高一下学期期末数学试题(已下线)专题11+平面向量应用举例(重点练)-2020-2021学年高一数学十分钟同步课堂专练(人教A版必修4)(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)沪教版(2020) 必修第二册 领航者 第8章 平面向量 8.4 向量的应用 第2课时 向量的应用(2)(已下线)2.5.2 向量在物理中的应用举例-2020-2021学年高一数学课时同步练(人教A版必修4)