已知向量
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14127c08702781352172ca921f4920fb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9caee500f89084c91e75d2627e659209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14127c08702781352172ca921f4920fb.png)
更新时间:2023-09-05 17:07:45
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【推荐1】在边长为
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________ .
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【推荐2】在
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【推荐2】设
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_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
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