已知
,回答下列问题:
(1)求
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9626e5b9db3f22a442f10fef71b76f83.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a2633112540130b130597a7f99ce33.png)
更新时间:2022-07-13 19:23:57
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