9-10高三·重庆·期中
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解题方法
1 . 设数列
的前
项和为
,对任意的正整数
,都有
成立,记
(
),
(1)求数列
的通项公式;
(2)记
(
),设数列
的前
和为
,求证:对任意正整数
,都有
.
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b3ec1726461d5ad9c7e19004dff67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e279470de7f4cf3e35cdefcf006bb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee77bfceb2d1e15120ba31621f9c86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef8539a7a09303a95b4e79fb9949fc.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6828a1cf75f19bb74a0e0490bd65c168.png)
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2016-11-30更新
|
784次组卷
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5卷引用:2011届重庆市西南师大附中高三期中考试理科数学卷
(已下线)2011届重庆市西南师大附中高三期中考试理科数学卷(已下线)2010-2011学年湖南省师大附中高一下学期期末考试(数学)(已下线)2013-2014学年广东省汕头市金山中学高一下学期期末考试数学试卷2016届安徽省六安市一中高三上学期第四次月考理科数学试卷福建省厦门六中2018-2019学年高二上学期期中考试数学(文科)试题
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2 . 已知数列{an}为等比数列,公比q>0,Sn为其前n项和,且a1=4,S3=28.
(1)求数列{an}的通项公式;
(2)若数列{bn}满足:
,求数列{bn}的前n项和Tn.
(1)求数列{an}的通项公式;
(2)若数列{bn}满足:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b24f96e9ce3cc4608774f56c36e66bc.png)
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