已知正整数数列
满足对任意的正整数
均有
,证明:存在无穷多个正整数对
(
),使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22277c45c7203fd3d692d3fcc38fa194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698c4d4e50062b4a7dd70fe1b4ab4fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14e88b76e8fbfed5a6b57a9e708fc21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6f8fe6bb79eca3ecb57816340d26bd.png)
2018高三·全国·竞赛 查看更多[1]
更新时间:2018-12-28 20:32:56
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解答题-证明题
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较难
(0.4)
【推荐1】已知数列
满足:
,且对于任意正整数
,均有
.
求证:(1)
;
(2)数列
为单调数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3270b2da0e77dbdd6d3c6ad86f28c206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273e9f34be39e9ae61043721d9c14577.png)
求证:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5749e4e6ecbead28a9027f2f687649cc.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467dbb09f25fc04c974f2be5e66405d8.png)
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解答题-证明题
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【推荐2】数列
满足:
,
.求证:对一切
,均有
.其中
表示不大于实数
的最大整数,
是斐波那契数列:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
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解答题-问答题
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【推荐1】求出所有非零整数
,使得
是一个整数.其中,
表示
的最大公因数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81148c128a8de0f80430ab11ef5b2b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
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【推荐2】黑板上写着11和13这两个数,现在从事如下操作:
(i)将某个数重写一遍;
(ii )将两数相加,写上和数.
试证明:
①119这个数永远不会出现在黑板上;
②任何大于119的自然数均可经过有限次操作在黑板上出现.
(i)将某个数重写一遍;
(ii )将两数相加,写上和数.
试证明:
①119这个数永远不会出现在黑板上;
②任何大于119的自然数均可经过有限次操作在黑板上出现.
您最近一年使用:0次