1 . 已知数列
,
,
的前n项和为
.
(1)证明:当
时,有
.
(2)已知
,求数列
的前n项和.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d33d4158f14b73b258c410f73aa4588.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9974a45de85004d0ef7a804c4b3e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
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名校
2 . 设
、
为常数,若存在大于1的整数
,使得无穷数列
满足
,则称数列
为“
数列”.
(1)设
,若首项为1的数列
为“
(3)数列”,求
;
(2)若首项为1的等比数列
为“
数列”,求数列
的通项公式,并指出相应的
的值;
(3)设
,若首项为1的数列
为“
数列”,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be33a7000b1656f7ac39942fb13bfcf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2308a0aeed12a4353b098ae06e04af9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da4f4bf9fb72cabd7afc5a67f6ecf1c.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c7de516ce17c4a6858f3bb5d6f83be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90707999e8fc89ae1137e5115c39f637.png)
(2)若首项为1的等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da4f4bf9fb72cabd7afc5a67f6ecf1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbf0a610575a6554b542fe9264a4b1e.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a360eaf352096db726d1289ee82972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce0bd3d027e3552a42f897566b613de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e7351b8037c517ab7980979323fa02c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf4fc1fcae464966e10b3578e650cee.png)
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3 .
是与
最接近的整数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672c681fca1ef390ca47a9f94aade005.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d249094ecb996458e35182d6b461299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672c681fca1ef390ca47a9f94aade005.png)
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名校
解题方法
4 . 已知
为等差数列,
为公比大于0的等比数列,且
,
,
,
.
(1)求
和
的通项公式;
(2)设
,求
;
(3)记
为
在区间
中项的个数,求数列
的前2021项和
.
![](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/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff86be56090d576aad0c0945a6bd2bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8510df1ea92703d6609cfcca667a394.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf01bd4c75500b5ed06298bd65d9cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b932a4b32849afaf65f0dd998307182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d82ffd329d22f8c43e14c861c26240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b3b3e014d7b0795c4a2f8f70601bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3577ef49a3177a78392e720ea4a04.png)
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5 . 两个数列
、
满足
,
,
,
(其中
),则
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
___________ .
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f2654efba30aab016f41d649af94ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b0dc86922174aa51684cc6eb6aa66c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2021-10-29更新
|
2570次组卷
|
10卷引用:江苏省徐州市第一中学2021-2022学年高二上学期10月月考数学试题
江苏省徐州市第一中学2021-2022学年高二上学期10月月考数学试题(已下线)专题4.1 数列 章末检测1(易)-【满分计划】2021-2022学年高二数学阶段性复习测试卷(苏教版2019选择性必修第一册)(已下线)专题15 数列构造求解析式必刷100题-【千题百练】2022年新高考数学高频考点+题型专项千题百练(新高考适用)(已下线)专题26 数列的通项公式-5(已下线)数列专题:利用递推关系求通项公式的8种常用方法-【题型分类归纳】2022-2023学年高二数学同步讲与练(人教A版2019选择性必修第二册)(已下线)第6讲 数列的通项公式的11种题型总结(4)江苏省常州市前黄高级中学2023届高三考前攀登行动(一)数学试题(已下线)第04讲 数列的通项公式(十六大题型)(讲义)-4(已下线)数列专题:利用递推关系求通项公式(8大题型)-2023-2024学年高二数学题型分类归纳讲与练(人教A版2019选择性必修第二册)(已下线)【练】 专题2 构造数列问题
6 . 已知
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d47668458ce6904bea9179f418cd352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b928f78545242ccc44010e5d1ef08fbd.png)
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7 . 已知数列
满足
,
,
.
(1)若对任意的正整数
,有
,求实数
的取值范围;
(2)若
,且对任意大于1的正整数
,有
恒成立,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d0b399e3826e2721d683a357fe5dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)若对任意的正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2798e1dcab1f7f0fe3b8a94b3cd6a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e006164b7245ccef533e99ac5c6b994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaacfaef44a654c0a1c283ef03fc0550.png)
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8 . 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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9 . 若数列
,求证:存在无穷多个正整数n,使得
,并确定是否存在无穷多个正整数n使得
?(这里
表示不超过x的最大整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f8dec8428b043470e96c94f99896a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2798e1dcab1f7f0fe3b8a94b3cd6a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1254070260067f8bf2fec39a7d0c8f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
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10 . 设
为给定的正整数,实数
及
满足如下条件:
(1)
;
(2)
;
(3)
;
(4)
.
证明:对一切
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e3d172f08313520e76b6cbc2ff9980c.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a81357dc2bcd382142e2aa19a74cadd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3785965a2dd765765ccef0330052fca7.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b04f7ed829546d2b2260985f507f3a8.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbe0bce8fb16093bc80ad1e0a472acf.png)
证明:对一切
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef835c9ad2636a9662fb6c99e3abc78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7a172e3de92f315198a515eef6ebbe.png)
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