已知
,
.求:
(1)
的值;
(2)
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ffe60e631f08f35177002acc01aa17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040a2f168bc405cacf00e1e08f316537.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c1a764c0f58f69357d4cd790d3a5d4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724e48b886c336d0d3e2f5fb512871f5.png)
更新时间:2021-03-25 13:40:12
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