1 . 已知数列
满足
,
a2(k∈若对于所有的
,均有
,求k的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf278d1b0afbae8e55bb58c33eab8ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e7b2d825b7ccad2aad05568b4f4439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d489449a96e523d0c91e0a44bfcc5ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25809c4ad8f07e80b10fdb5b40d6dfae.png)
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2 . 已知数列
满足
.
(1)证明:当n≥2时,
;
(2)当n≥4时,求
表示不超过实数x的最大整数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0449dd294ede7811635ebd98595c21.png)
(1)证明:当n≥2时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986cb57bb3477c4c9dc1518b1d4b77d3.png)
(2)当n≥4时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38cf77cceeea84669232fd3981f5529a.png)
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2014高三·江苏·竞赛
3 . 证明:存在无穷多个正整数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4527058bf4d5a9bd2f3ab172e8732f21.png)
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4 . 已知数列
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
满足
(1)证明:对一切的
,有
.
(2)求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8403d042c0394bcd82b5d0c2ab49e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6febbec171eb91cef5fe044734b1f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feacd516ccd94571dd1600a44b77ff9a.png)
(1)证明:对一切的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8403d042c0394bcd82b5d0c2ab49e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4291b6f4399a55d0248f630fc7a77e.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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5 . 设
均为大于1的整数.证明:存在
个不被
整除的整数,若将它们任意分成两组,则总有一组有若干个数的和被
整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c847ac9cba2b914f01f85e07e0ccc5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5631bc01b998a4b3fabd9e131699dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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6 . 设递增数列
满足
(
).
(1)求数列
的通项公式;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b177db870f81b9f26fd87fccda2177de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e167b43045b3297248e334c41c621b8f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea639d7e3dae98ffb67642d2cb9b89b6.png)
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7 . 证明:对每个正整数
,存在正整数
,使得能将前
个正整数所排成的数列1,2,…,
顺次分成这样的
段,其中每一段的各数之和均是平方数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daab2e7f7f9ea6d1dcaf060c783c756b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daab2e7f7f9ea6d1dcaf060c783c756b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daab2e7f7f9ea6d1dcaf060c783c756b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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8 . 设
是给定的正整数,
.记
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad89b2acebe155e869364acd8d464d77.png)
.证明:存在正整数
,使得
为一个整数,其中,
表示不小于实数
的最小整数(如
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ee72bf6c307a2d83a30c65893ebe90b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f721367c14f3dd608be3cbfe750eeb8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad89b2acebe155e869364acd8d464d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcf152cc8102e3472504d02355acde6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2890e1cf994207875837def2ca3e1ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898a6c355155c992f5e44bb86684225a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a3f52f0ecb7ce48378c464edf66c40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dbd410162b646ba0d5951fdb9cb0ea.png)
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9 .
的反函数是
,
,设
,且对于
,有
.求
的解析表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec11283c9e3c6ea5379370135fcd6818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc6c4e5bb6e207512630b32f27db1c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66a88cbaed58dcf9671ba9240359b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0316344ece953782b3e3ed27185ba53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7afeb1c6e47de3f6eb82fd4a0234b557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e338b64edbf3cab8609f51af26c1dd9.png)
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