10-11高二下·江西上饶·阶段练习
1 . 数列
中,
.
(1)求数列
的通项公式;
(2)数列前
项和记为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4164a243387bf802faf18dcfcb13a546.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)数列前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb20f4e3ca2656d8639100e704b33ce.png)
您最近一年使用:0次
2 . 已知数列
的通项为
,则数列
的前50项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d433517d14291abf6a38f29e75b691.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f837cb0dd540a3892bf835e3e9fc8911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d433517d14291abf6a38f29e75b691.png)
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3 . 已知点
是区域
,
,内的点,目标函数
,
的最大值记作
,若数列
的前
项和为
,
,且点
在直线
上.
(1)证明:数列
为等比数列;
(2)求数列
的前
项和为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a73eec052f0c295755a7d3f7979ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132e9579e58d8d5225e2340e1f43adf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75407f5349719aba26f58213459793eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9dc4e868a310c371ff88075d8a966a6.png)
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99fd670595a07ecf6b6397be4a79dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c6befd7218acfe7f6afa9cde0bcbe3b.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7d94406136605c5bc9cd9295d6c9fa.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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4 . 已知数列
满足
.
(1)试判断数列
是否为等比数列,并说明理由;
(2)设
,求数列
的的前
项的和
;
(3)设
,数列
的前
项的和为
.求证:对任意
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6f9839b688889a9a71d9f5e8e129bd.png)
(1)试判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c6048d7d15e323cdf1a56b3ffa580d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b31c12673390783878476b8213e86ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a060e7eec1379b2e230980bfe221f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22087b1c1c99fd26f05a7a2614a3026e.png)
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2016-12-04更新
|
691次组卷
|
2卷引用:江西省南昌市南昌县莲塘第一中学2018-2019学年高一下学期第一次月考数学(文)试题
5 . 已知公差不为零的等差数列
,若
,且
成等比数列.
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](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/2a18556fda4a825861f1170cdeb059ff.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267c99ff3f6386113dbaa7b1e49612da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2016-12-04更新
|
713次组卷
|
4卷引用:2015-2016学年江西上高二中高一下期末文科数学试卷
14-15高二上·河南·期中
名校
6 . 已知等比数列
满足
,且
是
,
的等差中项.
(1)求数列
的通项公式;
(2)若
,
,求使
成立的
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9546cd11292970aecfbca0a703ea77c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d473bfcc52ebc119430335531488a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c571c6a7e1e3ab0994be4b9ed79c40e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac96b09d3eccdb9a4c17ecbdec9ecebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29cc6d81a984865d3cf46fd7fde2a340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2016-12-04更新
|
622次组卷
|
9卷引用:江西省南昌市江西师大附中2024届高三上学期期中数学试题
江西省南昌市江西师大附中2024届高三上学期期中数学试题(已下线)2013-2014学年河南省师大附中高二实验班上学期期中考试数学试卷(已下线)2013-2014学年河南省师大附中高二上学期期中数学试卷2016届湖南省东部株洲二中六校高三12月联考文科数学卷2016届河北省邯郸市高三下第二次模拟考试数学(文)卷北京市朝阳区工大附中2016-2017高一下期中实验班数学试题【全国百强校】四川省绵阳市南山中学2017-2018学年高一下学期期末模拟考试(6月)数学试题浙江省湖州市长兴县、德清县,安吉县等三县2017-2018学年高二下学期期中数学试题吉林省四平市第一高级中学2019-2020学年高二上学期入学考试数学试题
7 . 有限数列D:
,
,…,
,其中
为数列D的前
项和,定义
为D的“德光和”,若有
项的数列
,
,…,
的“德光和”为
,则有
项的数列8,
,
,…,
的“德光和”为
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/0033d6d4f7554abc9806437179dfb40e.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/8fd3067839d14c609a1c661376516a50.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/43635cd36ae44b44bbde6ceb3b1c37fc.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/ef91665925464a78ad66268ec5485b76.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/71d52f5b6e014b9f8887335cfaa1e277.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/12e47b5664c847eab724a49fd60e15be.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/b189aa890e2a47a88ed2fed4b603daa1.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/0033d6d4f7554abc9806437179dfb40e.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/8fd3067839d14c609a1c661376516a50.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/04aa3e163b54491e9a14273415b143a0.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/c1cf04b94fea421ea1d4410280a26192.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/4971eb2c8fb04812b4c2462e5c88a896.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/0033d6d4f7554abc9806437179dfb40e.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/8fd3067839d14c609a1c661376516a50.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778509824/STEM/04aa3e163b54491e9a14273415b143a0.png)
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解题方法
8 . 已知数列
的前
项和为
,令
,记数列
的前
项为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07ee1fd9cc31c46e4aa7500d074d958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cbe01b1519ed619264a84564c45531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7aced7f4c805f94c0358ea85c772310.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 已知各项均为正数的数列
满足
, 且
,其中
.
(1)求数列
的通项公式;
(2)设数列
满足
,是否存在正整数
,使得
成等比数列?若存在,求出所有的
的值;若不存在,请说明理由.
(3)令
,记数列
的前
项和为
,其中
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbdfd5523cc91ee308847772fa516fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e2500e27b48f7a871992088e980cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209591cfb9f8271f5ad48d89f214f22e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2118bf592522dddaa9e37bb80e78a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abeaa9ca78c3d3651c303cc3ba6751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75117df5952d85134f335ff9f389b7b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a48e20c3d1363c66f8049553d10d17e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209591cfb9f8271f5ad48d89f214f22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453763dd5863b7d800a1430aa97f7a43.png)
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解题方法
10 . 数列{an}的前n项和是
,若数列{an}的各项按如下规则排列:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76907832d191d941c5cbef31600181e1.png)
…,
…
有如下运算和结论:
①
;
②
;
③数列a1,a2+a 3,a 4+a 5+a 6,a 7+a 8+a 9+a 10,…是等比数列;
④数列a 1,a 2+a 3,a 4+a 5+a 6,a 7+a 8+a 9+a 10,…的前n项和
;
在横线上填写出所有你认为是正确的运算结果或结论的序号________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76907832d191d941c5cbef31600181e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77cb3bee82d44a5d9a96c9a1252f99f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1dfbfb0232750983b537941de085953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc7040ad5dd0ebafac0e9f23bd54812.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277fb4772f833a5320a601add873d192.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e62963508712b6782f8d5101296187.png)
③数列a1,a2+a 3,a 4+a 5+a 6,a 7+a 8+a 9+a 10,…是等比数列;
④数列a 1,a 2+a 3,a 4+a 5+a 6,a 7+a 8+a 9+a 10,…的前n项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6d72db96302e3dd395a2f58e7f4c22.png)
在横线上填写出所有你认为是正确的运算结果或结论的序号
您最近一年使用:0次