(1)计算:
;
(2)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf31a9347be7e04b48d059e089ced04.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab64df55c1bbb8721c37c65afb16ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2024-05-26 18:29:06
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