计算下列各式.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c85d685c751ccf95d449622a7c17b19.png)
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c85d685c751ccf95d449622a7c17b19.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7a117068c8b22b712b2be51dedbb2.png)
更新时间:2020-02-23 16:54:52
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较易
(0.85)
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解题方法
【推荐2】(1)已知
,
,求
的值;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6641129efa81dd399ba44927e534b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1114e36df0cfd5b957b95a0518fa3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6792dbb20b5302f6a40cdd85b28018e0.png)
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