1 . 设数列
满足
,
,
.
是否存在正整数n,使得
,(
且
)?若存在,求出最小的正整数n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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bad4799a9f98ab10f5e1812222a33b5.png)
是否存在正整数n,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db3cd51d9228750c678d7fc9c14b2be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c940acaa0e804f0a20bc4962f1a7556e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62281712e48812993fc9b13c75184da.png)
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2 . 已知定义在R上的函数
满足
,且对任意实数x、y,恒有
①设数列
满足
.
(1)求数列
的通项公式;
(2)令
,
为数列
的前n项和.证明:
<1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09843ac8bfc370e6198ad56fb2bcda02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98818bef6625dfef58baf9c0730cb6f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc02ba6805524fc3b552865ac9db1c2b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0038314dfb078a2e0ac2ef375e96eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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3 . 定义数列
:
,
,
.
证明:(1)
为整数数列;
(2)
为完全平方数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1c48640454f88a486455b4bf1124848.png)
证明:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1b6183abae04810b2134fb1841a44e.png)
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4 . 设数列
的前n项和为
,点
在
的图像上.
(1)求数列
的通项公式;
(2)求
,且对任意的正整数n,均有
.证明:对任意
,总有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7119c1ea2321accb7e8bb391fa9c8a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16418488e7184ec275286d55e709a48d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8c7aac435710854216e3bca16176d7.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff58aa3ab29807fda113b73463e3e305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8a0c487e4c80517667c359ee396b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7486e37af3a2c7779b31ccc1523da0bf.png)
您最近一年使用:0次
2018-12-04更新
|
202次组卷
|
2卷引用:2016年全国高中数学联赛甘肃赛区预赛试题