名校
1 . 已知等差数列
的公差
,其前
项和为
,若
,且
成等比数列.
(1)求数列
的通项公式;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd71318ddbb81a2d7ed7847e1ff744a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000d4da0e3bbb394cf8f3b072bdd7462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd36e98dd9c90af2da2f59007d07d349.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9799cb6368dbe814001ad31b0e8998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bebd7246a1a023a65cb9bdfeb8ea33.png)
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13卷引用:陕西省延安市黄陵中学2018届高三(普通班)6月模拟考试数学(理)试题
陕西省延安市黄陵中学2018届高三(普通班)6月模拟考试数学(理)试题【全国市级联考】河南省郑州市2018届高三第三次质量预测数学(理)试题(已下线)2018年高考题及模拟题汇编 【理科】4.数列与不等式(已下线)2018年高考题及模拟题汇编 【文科】4.数列与不等式河南省郑州市第一中学2019-2020学年高三上学期期中考试数学(理)试题2020届山东省滕州市第一中学高三3月线上模拟考试数学试题河北省滦州市第一中学2019-2020学年高一下学期期中数学试题(已下线)第7篇——数列-新高考山东专题汇编(已下线)专题7.4 数列求和(讲)-2021年新高考数学一轮复习讲练测(已下线)专题7.4 数列求和(精讲)-2021年新高考数学一轮复习学与练(已下线)专题7.4 数列求和(讲)- 2022年高考数学一轮复习讲练测(新教材新高考)江西省南昌市新建区第一中学2020-2021学年高一下学期第一次月考数学试题福建省漳州市华安县第一中学2023-2024学年高二上学期第一次(10月)月考数学试题
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2 . 已知数列
的前
项和为
,且满足
.
(1)求数列
的通项公式;
(2)令
,
为
的前
项和,求证:
.
![](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/31ec833114c1e4f0ba7d0d8166958aa2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0707c1f657596a381470508ec271f544.png)
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7卷引用:陕西省西安市长安区2018届高三上学期质量检测大联考(一)数学理试题
陕西省西安市长安区2018届高三上学期质量检测大联考(一)数学理试题陕西省西安市长安区2018届高三上学期质量检测大联考(一)数学文试题河北省石家庄市第二中学2017届高三下学期模拟联考数学(理)试题河北省大名县第一中学2018届高三上学期第二次月考数学(文)试题河北省大名县第一中学2018届高三上学期第二次月考(理)数学试题2019年山西省忻州市静乐县静乐县第一中学高三下学期7月月考数学试题(已下线)第02章等比数列(B卷提升卷)-2020-2021学年高二数学必修五同步单元AB卷(苏教版,新课改地区专用)
名校
解题方法
3 . 设数列
满足
.
(Ⅰ)求
;
(Ⅱ)设
,数列
的前
项和为
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16016fad946b78f45152db45b6adebc4.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51e4a7f958501fae39645ca8f2a2d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/94bbce490db884e0198bc28f4766eb1b.png)
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2卷引用:陕西省咸阳市武功县普集高中2022届高三实验班下学期3月月考理科数学试题
4 . 已知函数![](https://img.xkw.com/dksih/QBM/2015/6/29/1572154525483008/1572154531463168/STEM/5cfee8ca9f9349f5bbccde956f55be8b.png)
(
)均在函数
的图象上.
(Ⅰ)求数列
的通项公式
;
(Ⅱ)令
证明:
![](https://img.xkw.com/dksih/QBM/2015/6/29/1572154525483008/1572154531463168/STEM/5cfee8ca9f9349f5bbccde956f55be8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0403400aef2bfb879ab7c9d9ab6c707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d726666f99a5a41dd673a2330e377b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(Ⅱ)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ed3368885dbc77d9b2d13f397f88b3.png)
![](https://img.xkw.com/dksih/QBM/2015/6/29/1572154525483008/1572154531463168/STEM/4b231b7216aa41908f65e0008fbffaf8.png)
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2卷引用:2015届陕西省西安市高新一中高三5月模拟考试理科数学试卷
名校
解题方法
5 . 已知数列{an}满足a1=1,an-2an-1-2n-1=0(n∈N*,n≥2).
(1)求证:数列{
}是等差数列;
(2)若数列{an}的前n项和为Sn,求Sn.
(1)求证:数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bad3b29191902b958ed56647b3e9980.png)
(2)若数列{an}的前n项和为Sn,求Sn.
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解题方法
6 . 已知数列
的前
项和为
,且
.
(1)证明:数列
是等差数列,并求出数列
的通项公式;
(2)求数列
的前
项和为
.
![](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/57c599e7cec6d192fb73218e7882ceca.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbe113b7c2cc1b464e86bdfa3a6fe2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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5卷引用:陕西省安康市2020-2021学年高二下学期期中理科数学试题
7 . 设数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc1d92f944a81cb293bc6ba129eeed0.png)
(1)求
的通项公式;
(2)设
,记
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc1d92f944a81cb293bc6ba129eeed0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649bef7505f1c29d76cbfe360629ffe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2916d4549d1d6cb4d1651afedfb319b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5737f1f9cad2471f3ca53241b25a1eb9.png)
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