已知向量
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d26346daa7d4f7c0c7acae1aaa2ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8a4d21c520f5a154f71b40f8e7ee05.png)
A.![]() | B.![]() | C.2 | D.4 |
更新时间:2017-12-18 16:31:42
|
相似题推荐
单选题
|
较易
(0.85)
解题方法
【推荐1】在平面直角坐标系
中,
,
分别是与
轴、
轴方向相同的单位向量,已知
,
,
,若
与
共线,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf2a896afb91ca06b513acd1a73bb83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821a7c2e810ef18a2ee78f3722f03c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88530e0c0a015d6966ddd2aacefda5ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36744e348f118c4de242481c595295dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3714bec90a2f3315813a7075c8907ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.4 | B.1 | C.3 | D.2 |
您最近一年使用:0次
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较易
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名校
解题方法
【推荐2】已知向量
,
,若
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e78e30f8d8eab6e07a6bfcfbff3dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a0a45554867032bda14f727d630168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b19e9066e6ebe86de2108970c51a8b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.2 | B.![]() | C.4 | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】已知向量
,则向量
在向量
上的投影向量
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6c64d5b291024ee375fd63e61d2b6d.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/e8af740e84814052ba6b234972eb5967.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐3】已知向量
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40a5453df99f76481928cd21c75bab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fdbd85e84aac2e7a588f9b9dd52810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8e23423ba05ff0072a71738caa5d65.png)
A.2 | B.3 | C.4 | D.![]() |
您最近一年使用:0次