1 . 设数列
满足
,且对任意正整数
均有
.求
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6324f5c2c73bdcac4e9154429ac79baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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2 . 设
和
为两组复数,满足:
.求证:存在数组
(其中
),使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b2f1f2faeb04505752c4c08b5d4a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b023415e27a14faac81fd5237fa1a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38af3182c396bef07007d4b04c92d32c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f094ba98f6c02216c714bd9ff85bd59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057d57358dd4fd992df26157efa5bd9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c72aec1d89b300f5a069080cdd3e1a.png)
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3 . 设数列
满足
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2577a0871cb3b018eb5e2840da1d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d5780c707bbf8fc91265df5f2093cb.png)
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4 . 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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5 . 已知数列
满足
.
(1)求证:
.
(2)是否存在实数
,使得
,若存在求出
的值;若不存在.请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dffe4a726c5d5c2c1b51255dd6e9015.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41ebd083ba2fdca7e830d62e3d5181b.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0920804135bf9f7a222df640a6e874ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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6 . 对于数列
,若存在常数
使得
对任意正整数
成立,则称
是有界数列.已知数列
满足递推式
,求证:
(1)若
,则
不是有界数列.
(2)若
,则
是有界数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbb510a00c96650e85fa03afed69d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bcb64530e6818698cc3d83c87a93c1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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7 . 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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8 . 设n为不小于3的正整数,在正n边形中,选取一些对角线,满足其中的任两条对角线若在多边形内部相交则一定垂直.问:最多可选取多少条对角线?
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9 . 已知n个非负实数
和为1.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/493f509c3370b2b26d46e2e46d038134.png)
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10 . 给定整数
.求具有下列性质的最大常数
,若实数列
满足:
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0dc284b8b34f03783c2207e35cf626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67135f5e426945425bcfc0d0e167a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0700b44523ab8cc957bdcb1721367d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcebc0ae9b76e0ef2ee54385dc9c83a.png)
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