已知向量
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172014fe535f3d3095bfc9cf9a51de6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67584e2063b8190b096eda30501e596b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708c0ae904e5544630371a168001fdc5.png)
A.3 | B.5 | C.9 | D.25 |
更新时间:2020-12-11 23:32:22
|
相似题推荐
单选题
|
容易
(0.94)
解题方法
【推荐1】已知向量
,
是与
方向相同的单位向量,则
在
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed02a3002ca2f08a7085b0a94487f04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c984376f5475184e0d3e4f7e1bb65f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
容易
(0.94)
解题方法
【推荐2】已知平面向量
,
,若
,则实数
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e041dbcd07a7e1ed1bf521229528101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be1dd1e83df126808e35e84fd768f5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
A.![]() | B.![]() | C.1 | D.4 |
您最近一年使用:0次
单选题
|
容易
(0.94)
【推荐3】已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7664325facff9aa69197a0bc658d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57e5f90719d06115e5828e8ae8cd715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a9d11c1fdda8f3bb2ef921bc75f816.png)
A.-3 | B.-2 | C.2 | D.3 |
您最近一年使用:0次
单选题
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容易
(0.94)
名校
【推荐1】已知
,
,若
与
模相等,则
=( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3861ae809a6955249ea53f4649548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a198d203c61888c6989ea8b6332edaa1.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/2b6fbff85947f4df50ae1b17e967a158.png)
A.3 | B.4 | C.5 | D.6 |
您最近一年使用:0次
单选题
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容易
(0.94)
【推荐2】已知向量
,则向量
在向量
方向上的投影为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534b2a33c73191f07ce121ef3b726b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
A.![]() | B.![]() | C.5 | D.![]() |
您最近一年使用:0次