解题方法
1 . 设等差数列{an}的前n项和为Sn,且满足a1=2,S7=35,将a3,a7,a11,a15中去掉一项后,剩下的三项按原来的顺序恰为等比数列{bn}的前三项,则数列{anbn}的前10项的和T10=( )
A.10![]() | B.9![]() | C.11![]() | D.12![]() |
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内蒙古赤峰市2020届高三(5月份)高考数学(理科)模拟试题(已下线)第23练 数列的通项与求和-2021年高考数学(文)一轮复习小题必刷(已下线)第24练 数列的通项与求和-2021年高考数学(理)一轮复习小题必刷重庆市南开中学2021届高三五模数学试题(已下线)模块综合练02 数列-2022年高考数学(理)一轮复习小题多维练(全国通用)(已下线)考向29 数列求和(重点)(已下线)解密11 数列的前n项和及其应用(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)(已下线)文科数学-2022年高考押题预测卷03(全国甲卷)
2 . 若干个正方体形状的积木按下图所示摆成塔型:上方正方体中下底面的四个顶点是下面相邻正方体中上底面各边的中点,最下面的正方体的棱长为1,平放于桌面上,如果所有正方体能直接看到的表面积超过8.8,则正方体的个数至少是( )
![](https://img.xkw.com/dksih/QBM/2022/3/27/2945265653293056/2958670435295232/STEM/ff1bdec93c5e41f89f4dce33ad619f06.png?resizew=272)
![](https://img.xkw.com/dksih/QBM/2022/3/27/2945265653293056/2958670435295232/STEM/ff1bdec93c5e41f89f4dce33ad619f06.png?resizew=272)
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3 . 已知数列
是首项
,公比
的等比数列,且
,
,
成等差数列,则公比
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45482d31d1d7448c9f3922b4d2a55331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a37f1b45e929b42044626edb63681fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f21a4cf83ae8757174c75eced07ae88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4卷引用:【全国百强校】内蒙古赤峰二中2017-2018学年高一4月月考数学试题
解题方法
4 . 若干个正方体形状的积木按下图所示摆成塔型:上方正方体中下底面的四个顶点是下面相邻正方体中上底面各边的中点,最下面的正方体的棱长为1,平放于桌面上,如果所有正方体能直接看到的表面积超过8.8,则正方体的个数至少是( )
![](https://img.xkw.com/dksih/QBM/2022/3/25/2944011829731328/2944618457251840/STEM/9edde9fe-1dde-4a60-903b-524d84967b0f.png?resizew=169)
![](https://img.xkw.com/dksih/QBM/2022/3/25/2944011829731328/2944618457251840/STEM/9edde9fe-1dde-4a60-903b-524d84967b0f.png?resizew=169)
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5 . 公比为
的等比数列
的各项都是正数,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55df059a3e31d7decf2e2a657541d43b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8902f22f7f863a60af2a51f446a18308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1779b63df1485d68108ba8bf7b2a5d83.png)
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2卷引用:内蒙古阿拉善盟第一中学2020-2021学年高二上学期第二次段考理科数学试题
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6 . 已知数列
满足
,且
,则数列
的通项是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ce9d5623b21817dd182b9058dc271a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2卷引用:【全国百强校】内蒙古赤峰二中2018-2019学年高一下学期第一次月考数学(文)试题
7 . 已知公比大于1的等比数列
满足
,
.则数列
的前
项的和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fb4b599e37a825bce2a0c29f09af8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a316124e688e76d6f330ffbea49d427d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de07d547cae0d3f718003f8c3b6c265d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
8 . 已知数列
的首项
,前
项和为
.设
与
是常数,若对一切正整数
,均有
成立,则称此数列为“
”数列.若数列
是“
”数列,且
,则数列
的通项公式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c6e0c2d16cda7e8b2b8c588adeb8ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.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/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418e866e8752895267848ad0ddb624ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f585fd4f5740af3c76c580d256b09bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0052f24767bf773e49ac2162a4c7bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
9 . 已知
是首项为
的等比数列,
是
的前
项和,且
,则数列
的前
项和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/43bdcb11bbf531b519647bd47f8d8dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a44cfbb86a4eb76261c00ddc6bff181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
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10 . 已知数列
的前n项和为
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868b591bbf34859bf491022407a44f30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868b591bbf34859bf491022407a44f30.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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