设
,且
.
(1)求
和
; (2)求
在
方向上的投影; (3)求
和
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3791b3b6173339afa89b8dcc5217ad09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a666d18f3f4577846fd67f05e547fe3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b5dc876d7dcd3c971b36d26668b1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7345f310975ddb40dca94b5135c35dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5090120f96f1f6bcf22a7364e6e711.png)
12-13高一下·山西·期中 查看更多[2]
更新时间:2016-12-02 07:09:55
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