(1)用分析法证明:
;
(2)已知
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a32d0f7e905eac3307fee8c659ad14.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/312330b725733eae9029151f6b739840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebb4d562f56378b1c95ee5572964f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bffe8ab190d99fa28d57063b672e6ac.png)
更新时间:2021-07-10 15:58:08
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(2)
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