选修4—5:不等式选讲
已知定义在R上的函数
的最小值为
.
(I)求
的值;
(II)若
为正实数,且
,求证:
.
已知定义在R上的函数
![](https://img.xkw.com/dksih/QBM/2014/6/23/1578327182180352/1578327182901248/STEM/1829f265c5174f6db309ed73e25e7eb9.png)
![](https://img.xkw.com/dksih/QBM/2014/6/23/1578327182180352/1578327182901248/STEM/f8924256564d493088b214be24db7a79.png)
(I)求
![](https://img.xkw.com/dksih/QBM/2014/6/23/1578327182180352/1578327182901248/STEM/f8924256564d493088b214be24db7a79.png)
(II)若
![](https://img.xkw.com/dksih/QBM/2014/6/23/1578327182180352/1578327182901248/STEM/cb82f58181524d41aae1af9ee8606825.png)
![](https://img.xkw.com/dksih/QBM/2014/6/23/1578327182180352/1578327182901248/STEM/2c110ad6d66341798cd14d5b87a54b1c.png)
![](https://img.xkw.com/dksih/QBM/2014/6/23/1578327182180352/1578327182901248/STEM/02a17e160e05477fb606e96e26d0f9eb.png)
更新时间:2016-12-12 08:17:47
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【知识点】 柯西不等式
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解答题-证明题
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困难
(0.15)
【推荐2】
是大于1的整数,正实数
满足
.令
.求证:
(1)
;
(2)
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efee470d0232b6b37f2fb2ab15aae0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533563d6707f14da5ce070922bb56a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897b606fdc64a88a0938d3d60c3ea3e9.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef1ddb36abd38e9be1d67e5b481294f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722e33a856a648d2a7b9471fc44db6bb.png)
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