1 . 已知
,
,则
在
方向上的投影向量坐标为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9ec6b012238b70d419ef25531199a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30809bcf0c6270ca3cd40ae0e599e9d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
您最近一年使用:0次
解题方法
2 . 设向量
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f233803ccc487b243f31ae3b2846d60.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db31b05cd6e12ee15c9ab1219eedcbec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f1b1d236c77645c4a610c7c45a0b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f233803ccc487b243f31ae3b2846d60.png)
您最近一年使用:0次