解题方法
1 . 已知等比数列
满足
.
(1)求
的通项公式;
(2)记
的前n项和为
,证明:
,
,
成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b949034bad3df5eca3a803be68a758.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](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/8946d64da80fe7ecce8749a48860b93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a35d79a1b4df9e4aade6a92f35bea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86b511559317623504fda5f526e383a.png)
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3卷引用:广东省深圳市光明区2021-2022学年高二上学期期末数学试题
广东省深圳市光明区2021-2022学年高二上学期期末数学试题(已下线)高二数学下学期期末精选50题(提升版)-2021-2022学年高二数学考试满分全攻略(人教A版2019选修第二册+第三册)广东省信宜市2022-2023学年高二上学期期末数学试题
2 . 已知等差数列
满足
,
.
(1)求数列
的通项公式及前10项和
;
(2)等比数列
满足
,
,求和:
.
![](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/c4fb4b599e37a825bce2a0c29f09af8d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
(2)等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0746f67dcd1c4a16670c9dca1efc86d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f446ac15a5b4436ca0203dc4c76af425.png)
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解题方法
3 . 已知各项都为正数的等比数列
,其公比为q,前n项和为
,满足
,且
是
与
的等差中项,则下列选项正确的是( ).
![](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/5525b6b2b529e7eaaaf665943732e10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be78feec41e2b2ca828ee07feb8aa0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d93c1ae7b22099a5d4c1c4241e5ca18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d473bfcc52ebc119430335531488a3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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4 . 已知数列
的前n项和为
,
,且
.
(1)求数列
的通项公式;
(2)令
,记数列
的前n项和为
,求证:
.
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7626fe4daff9eccd87fca7e7f13d7ea4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6327e3c52f642e5ed2127f1e9983068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3819480e1e624208f729ad8653e4f24f.png)
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名校
5 . 在递增等比数列
中,
为其前n项和.已知
,
,且
,则数列
的公比为( )
![](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/92fab43382de908f2719106f54a2fcf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1b2fb5f9f0070088b5f595a9d14ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224ee74af22e1a75a921a7f78ecfd772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.3 | B.4 | C.5 | D.6 |
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2卷引用:广东省汕尾市2021-2022学年高二上学期期末数学试题
6 . 已知数列
满足
,
.
(1)记
,写出
,
,并求数列
的通项公式;
(2)求
的值.
![](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/027231e457a8e8413501f8c777204095.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/314501f06c7e4bf3112fe41ecac7be68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435f7ade2797f0f89acf7a0f8f5111ca.png)
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名校
解题方法
7 . 已知数列{
}的前n项和为
,且2
=3
-3(n∈
)
(1)求数列{
}的通项公式
(2)若
=(n+1)
,求数列{
}的前n项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52866a74e4af867ceea0efb1ad06602c.png)
(1)求数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
8 . 对于下面这个等式我们除了可以用等比数列的求和公式获得,还可以用数学归纳法对其进行证明“
”,那么在应用数学归纳法证明时,当验证
是否成立时,左边的式子应该是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40da9969683e50b098c6a16d213f6f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
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9 . 2013年9月7日,习近平总书记在哈萨克斯坦纳扎尔巴耶夫大学发表演讲在谈到环境保护问题时提出“绿水青山就是金山银山”这一科学论新.某市为了改善当地生态环境,2014年投入资金160万元,以后每年投入资金比上一年增加20万元,从2021年开始每年投入资金比上一年增加10%,到2024年底该市生态环境建设投资总额大约为( )(其中
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62316f0a980a747ae4cb053c92fca66f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10321c81aeeafcc2ec275d9f75c4e995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f027c0d8c302659afe8faee363d28f.png)
A.2559万元 | B.2969万元 | C.3005万元 | D.3040万元 |
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4卷引用:广东省深圳市罗湖外语学校2021-2022学年高二上学期期末数学试题
广东省深圳市罗湖外语学校2021-2022学年高二上学期期末数学试题(已下线)高二数学下学期期末精选50题(提升版)-2021-2022学年高二数学考试满分全攻略(人教A版2019选修第二册+第三册)(已下线)专题6 纳皮尔北京市第一六六中学2022-2023学年高二下学期3月阶段性诊断数学试题
名校
10 . 已知数列
满足
,
.
(1)记
,写出
,
,并求数列
的通项公式;
(2)求
的前12项和.
![](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/4184e7c0b71db1ebbe58755b104da7bb.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/314501f06c7e4bf3112fe41ecac7be68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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4卷引用:内蒙古包头市2021-2022学年高三上学期期末考试数学(理)试题
内蒙古包头市2021-2022学年高三上学期期末考试数学(理)试题(已下线)专题1 一般数列基本运算(基础版)甘肃省武威市天祝藏族自治县第一中学2023-2024学年高二上学期第一次月考(9月)数学试题(已下线)专题2 奇偶分项 分组并项 讲(经典好题母题)