(1)化简求值:
;
(2)已知
,且
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503bcdd029abf6df0e7d95df2bc284d1.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a424f282c51f2801a1c92f9c7f673b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509f3b3c1900fb5a6370964162760a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2021-01-03 08:17:46
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【推荐2】已知
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