1 . 给定正整数
.求最大的实数
.使得
对任意正实数
恒成立,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526e037512bd10e65ebd99b73aa26341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897b606fdc64a88a0938d3d60c3ea3e9.png)
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2 . 求具有下述性质的最大整数m:对全体正整数的任意一个排列
,总存在正整数
,使得:
构成公差为奇数的等差数列.(可以认为:两项也是等差的)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8748938373768d7172dc2a8d43ee2d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0844d2b5218031f4a67807468b02653c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82079a5446d448fb1bea730b968d7e02.png)
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3 . 设
均为正数,证明:
(1)若
,则
;
(2)若
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6aa7413d61d5f084dff82223388b5c5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bde47288bc17f24c9a05ced2e48cb5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bddaa8662b7e7df9e093b924ea7aaea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23067dc8ae6048baaf5507cbc5b76172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6faf3b389d760578d8c1c3934c56c969.png)
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