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解题方法
1 . [选修4-5:不等式选讲]
已知
,
,
,函数
的最小值为
.
(1)求
的值 ;
(2)证明:
.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b51d1fe37f7b2fbc33cfe9ba2f6cc99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53aac8ed7ecc41d22656d55b76cbd6b3.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b030a74fafdbe385b16c503310bfd791.png)
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