若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c9ac4246e2ffa451c7f83300c8d1e4.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a1f4d8215bb31f877506d4b18d376a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c9ac4246e2ffa451c7f83300c8d1e4.png)
更新时间:2021-10-26 16:02:30
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【推荐2】已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10eeb9a521911789846be83efe0a18b9.png)
_______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfd4bbdd3fbc600e55e1f5d83e9a883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10eeb9a521911789846be83efe0a18b9.png)
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