已知向量
,
,
.求:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658951279fea85253938b0a43c80c6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d9c3cbf00d2de06a6b4289e0a04859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e848a55a93ba87166680ca3312f36dc7.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b6649aeeec606701acd3361e8854d9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae34b6e1941d3014254bb61312aa6589.png)
更新时间:2020-12-29 18:25:22
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