证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce3c4d45abb2302a1328a75e12cfd6d.png)
更新时间:2018-12-06 23:12:11
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【知识点】 判断单调性
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解答题-问答题
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较难
(0.4)
【推荐2】设
,
.证明:
(1)
,并说明等号成立的条件;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d2fc03d083218f9cf386fbcbb8a418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c191d8e799cc95ba94265065358071c7.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ef4038f7ce2cd1ac8b4bd9bd59f937.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24d8650153d6030223fc1707c122484.png)
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