名校
解题方法
1 . 已知数列的前
的前n项和为
,数列的
的前n项和为
,则满足
的最小n的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d534aa3f8f74e291ca2b8404b9a38314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2298dc9aa9a204a8ed4a17b1e776dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80c059ee6ec39c2bf14730d4d6d6613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f349306bf7b529e3fc82ae4414e1cb3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6ccf4598c46dde8a97359f01ac9d17.png)
您最近一年使用:0次
2018-05-02更新
|
905次组卷
|
5卷引用:重庆市第七中学校2023-2024学年高二上学期第一次月考数学试题
2 . 已知数列
的前
项和为
,且
,
,则若存在正整数
使得
成立,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7462c80ba563bc747cdf136b1156109d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3ede255fecf6aba650c90309d62670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db733494e8d0b6f02d9d53343306fdf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08075b3b73dd2609baad69a496fdd9a8.png)
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3 . 数列
中
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c612fb2fed7c255a981cff9013063f4f.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5fcd4d122f4c68815aae8dee472f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c612fb2fed7c255a981cff9013063f4f.png)
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解题方法
4 . 已知数列
的前
项和为
,
,
,则数列
的通项公式为_______ .
![](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/d1fbf5ab8343d9f8d6c2bf52e0d4a1f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
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5 . 已知数列
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a135faef5280411b58a993a74b5deaff.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b562e7152138962a18c0b29d6b554b92.png)
__________ .
![](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/a135faef5280411b58a993a74b5deaff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4296390de0034043c3b14848c73fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b562e7152138962a18c0b29d6b554b92.png)
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6 . 数列
中,
,若数列
满足
,则数列
的最大项为第__________ 项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175e92731a24a2c2b763742a8e5db61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabad0eda18463f695894cb30e3d8dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
您最近一年使用:0次
2018-03-18更新
|
939次组卷
|
5卷引用:重庆市万州第三中学2018-2019学年高一下学期期中数学试题
重庆市万州第三中学2018-2019学年高一下学期期中数学试题福建省福州市闽侯第六中学2018届高三上学期期中考试数学(文)试题山西省太原市2018届高三3月模拟考试(一)数学理试题(已下线)4.2求数列的通项公式与前n项的和[理]-《备战2020年高考精选考点专项突破题集》(已下线)4.2求数列的通项公式与前n项的和[文] -《备战2020年高考精选考点专项突破题集》
名校
7 . 在数列
中,
为其前
项和,若对任意
,都有
,则数列
的通项公式![](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/f29c79fdd620d9b767f6ddd46b9fa867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763646c96a574850f639f81f2c092c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b549567c83e1910fb53de414e0905afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2018-06-10更新
|
481次组卷
|
4卷引用:【全国百强校】重庆市綦江中学2017-2018学年高一下学期第三学月考试数学试题
名校
8 . 如图,这是一个正八边形的序列,则第
个图形的边数(不包含内部的边)是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/2017/6/4/1701857123196928/1702189944307712/STEM/c63b16b1415541f1a13fb6a176e0a115.png?resizew=316)
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9 . 设数列
的前
项和是
,满足
,
,则当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/d551c8c538e1128a08d251549134af3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cefeddf71dca8ae824328df3f0e5e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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解题方法
10 . 已知数列
的前
项和为
,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
__________ .(用数字作答)
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c49499f42bede1d98da0159082e2883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531faec6b55a0d6dee48be2c0d8c2758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
您最近一年使用:0次
2017-04-15更新
|
720次组卷
|
3卷引用:2017届重庆市高三4月调研测试(二诊)数学理试卷