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解题方法
1 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b156edd44e474e27868a8b1baeaf2bc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
您最近一年使用:0次
2 . 若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18ac2817c37f1e8ceaf0b2ad0719945.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684f5a2de07508fbc55c09c63a90f2e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7447e8dad4b464afe45034b62b3be4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18ac2817c37f1e8ceaf0b2ad0719945.png)
您最近一年使用:0次