化简:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62615893fb843e9e17c732e2d3c295b1.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62615893fb843e9e17c732e2d3c295b1.png)
19-20高一下·湖北襄阳·阶段练习 查看更多[2]
更新时间:2020-05-09 13:50:12
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【推荐1】已知向量
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【推荐2】如图,在平行四边形
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____________ ;
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________ ;
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09bcdff1bc9ced9f30e82aeafdb73676.png)
_______ ;
(4)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2538e534c0c1998dbfc2a6f5cb885a5.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】已知A(1,0),B(4,0),C(3,4),O为坐标原点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8684cb9b193a5967e652116c9feaf531.png)
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解题方法
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