已知向量
,
,若
与
方向相反,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7e6b95167f61e355deda5a36ebbcfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc6ea1ee01c24177d15ce1776a33fe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ee058d80bf1f695e71ad49beb81f81.png)
A.![]() | B.![]() | C.![]() | D.5 |
更新时间:2023-07-07 13:20:19
|
相似题推荐
单选题
|
较易
(0.85)
解题方法
【推荐1】已知向量
,
,
,若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c5293dfdbd72411423003ec100c910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290481b1b277e28bf11db2a29985b91d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad514791023ee6af39ad8228eb06838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e9c12a46c298c02ebf02d135448312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
A.2 | B.-2 | C.![]() | D.![]() |
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【推荐2】设
,
是两个不共线的向量,若向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/399ae3bfdf0f4886a757e18c81faae9b.png)
与向量
共线,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2868a9fe011f56a80c9d1a8ee4604d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fe4e713c108e118522a99ecd683924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/399ae3bfdf0f4886a757e18c81faae9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597ea4818f3601c594669d4972bc59f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6e1eaebfce6d29bf535642177038a2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐1】如果平面向量
,
,那么下列结论中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6058a2d06b42c223208e37b901b7ff9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a38afd43a2b5b67366f3376abd3e35.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
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【推荐2】已知向量
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b8824d370c6d808af134e0d40f2c0c.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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【推荐3】已知向量
,
,
,则
、
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479779070b95c1c2845f0a24dc8d5f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df42687a73cb92e92a3cb6e54f1edb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5303a18dfa0bf58161bf741d9bef8a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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