2011高三上·湖南邵阳·专题练习
1 . 设
为等差数列,
为数列
的前
项和,已知
,
,求数列
的通项公式.
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f24d2ada5ab0a27cdb322b0f0090b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d54406efec60657dfbf8666d3ad56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2011高三上·湖南邵阳·专题练习
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2 . 在等差数列{
}中,前15项的和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c47da2d995b1b0e608fc1a06b8c61f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
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2016-11-30更新
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4卷引用:2011年湖南省洞口四中上学期高考数学数列专项练习题
(已下线)2011年湖南省洞口四中上学期高考数学数列专项练习题沪教版(上海) 高三年级 新高考辅导与训练 第四章 数列与数学归纳法 本章测试(已下线)2011-2012学年江苏南通市第三中学高一下学期期中数学试卷江苏省南通市如皋中学2019-2020学年高一下学期5月阶段考试数学试题
2011高三上·湖南邵阳·专题练习
名校
解题方法
3 . 若数列
的前n项的和
,那么这个数列的通项公式为( )
![](https://img.xkw.com/dksih/QBM/2013/1/7/1571093121835008/1571093127307264/STEM/06d85d92f6d446e2a5a1772decbc6257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d517c0254fc7e4810ad72c60f1fce206.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2011高三上·湖南邵阳·专题练习
解题方法
4 . 数列
是公比为
的等比数列,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f3baec27d7bfe063a9ecc99d929530.png)
(1)求公比
;
(2)令
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f3baec27d7bfe063a9ecc99d929530.png)
(1)求公比
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0f044dc82a12fd1c71872f2ac12d06.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/08eb71ecf8d733b6932f4680874dbbf3.png)
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2011高三上·湖南邵阳·专题练习
5 . 数列
的前
项和为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64deaaf4f530836002e92f14fc9d10d8.png)
(1)求
;(2)证明:数列
是等比数列,并求
.
![](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/64deaaf4f530836002e92f14fc9d10d8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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