名校
解题方法
1 . 记
,为数列
的前n项和,已知
,
.
(1)求
,并证明
是等差数列;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a95240946e433fafd9e063827c0a6c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6f19b84484b5480ea2100165abfd81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0dc13236eaa2bd0cdc0f24beea11fe.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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10卷引用:江西省丰城中学2022-2023学年高三下学期3月月考文科数学试题
2 . 数列
前
项和为
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ce017b600a6dce7321bc7e9ab6c69b.png)
(1)求数列
的通项公式;
(2)证明
.
![](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/a4ce017b600a6dce7321bc7e9ab6c69b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd7007c198913e859aaca34ff6e6d15.png)
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3卷引用:江西省南昌市进贤一中2019-2020学年高一下学期第一次月考(网上)数学试题
(已下线)江西省南昌市进贤一中2019-2020学年高一下学期第一次月考(网上)数学试题黑龙江省哈尔滨市三中2018-2019学年高一下学期第一模块数学试题【全国百强校】黑龙江省哈尔滨市第三中学校2018-2019学年高一下学期期中考试数学试题
名校
3 . 已知数列
的前
项和为
且
,
.
(1)求证
为等比数列,并求出数列
的通项公式;
(2)设数列
的前
项和为
,是否存在正整数
,对任意
,不等式
恒成立?若存在,求出
的最小值,若不存在,请说明理由.
![](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/8d7a9511c3d1b6d41d17df1559919880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8adbe4d237aa33ca4d24901df8cfcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b93708dc68d1509f7030bdf7918bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad83668ff336589f82a2cd04db9f9947.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/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b04c7ba0ffd54e60b2829f4440c91ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae1d8b82b6b00c861167fa7c3a796c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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4卷引用:江西省抚州市临川区第一中学2017-2018学年高二上学期第一次月考数学(文)试题
11-12高三下·江西赣州·阶段练习
4 . 已知
,数列
的前n项和为
,点
在曲线y=f(x)上
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246d011548710349f0fcd72c5e70df8b.png)
(1)求数列
的通项公式 (2) 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47cf17bc1492df6e3c9f3c8605bda22.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/2f1c751fcdb2e157dec6e45f0df5464f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fc82353331abee0828dee9b38c08f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246d011548710349f0fcd72c5e70df8b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59d4914a9f81160daa03213177e5a55.png)
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5 . 设数列{an}满足:a1=1,an+1=3an,n∈N*.设Sn为数列{bn}的前n项和,已知b1≠0,
2bn–b1=S1•Sn,n∈N*.
(Ⅰ)求数列{an},{bn}的通项公式;
(Ⅱ)设
,求数列{cn}的前n项和Tn;
(Ⅲ)证明:对任意n∈N*且n≥2,有
+
+…+
<
.
2bn–b1=S1•Sn,n∈N*.
(Ⅰ)求数列{an},{bn}的通项公式;
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba66ef1e765632f1f62a896a55345ec0.png)
(Ⅲ)证明:对任意n∈N*且n≥2,有
![](https://img.xkw.com/dksih/QBM/2016/4/6/1578863833063424/1578863833587712/STEM/5cbea60fcd9a41df820c1348be5fb289.png)
![](https://img.xkw.com/dksih/QBM/2016/4/6/1578863833063424/1578863833587712/STEM/cd58906f007c4bbb91a3c58d0302b741.png)
![](https://img.xkw.com/dksih/QBM/2016/4/6/1578863833063424/1578863833587712/STEM/7b9080738c67409fa6e3b7faba7dfb8d.png)
![](https://img.xkw.com/dksih/QBM/2016/4/6/1578863833063424/1578863833587712/STEM/acf6c460768a40beaf739da22cdbf90a.png)
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2016-12-03更新
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