若
,则
或![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32112e7ad1091ae2da4009eec3610e49.png)
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7677fa4ecba4dd4005f5a1b52cf86b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57a47c35195783f2eba8c6fd6649594.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32112e7ad1091ae2da4009eec3610e49.png)
更新时间:2021-08-26 23:01:30
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【知识点】 空间向量数量积的应用