1 . 已知等差数列
公差
,
为等比数列,
,
,
.
(1)求
;
(2)设
,数列
的前n项和为
,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83a43876d05cb2229a883da5c5397a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaa992a449b828df0ff545e233b279b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84f592310f4b9637b225cab622b2aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d438131add92b51c4e0b06ec6aff581.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbbf4d763f3cbe5a71707bc19c78191.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d73f96ab40aac720f49dd74c318bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2 . 已知数列
中,
且
是等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be82e4afb3d8a86df68d7a9f9cc8fee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
(1)求数列的通项公式;
(2)若求数列
的前
项和
.
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2017-12-26更新
|
500次组卷
|
3卷引用:海南省东方市八所中学2018-2019学年高一下学期期中考试数学试题
3 . 已知数列
的前
项和
,数列
满足
,
,
(Ⅰ)求数列
和数列
的通项
和
;
(Ⅱ)若
,求数列
的前
项和
.
![](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/d255ea8e125b603d6b640bdf4a804922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcba622ae8d5e614f5f59982ce9b9b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a161b12ac9ba38aa73f386242908bed1.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b57fc61aae0064542bbb65f1df944a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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9-10高一下·海南·期中
4 . 设数列
的前n项和为Sn=2n2,
为等比数列,且![](https://img.xkw.com/dksih/QBM/2013/3/8/1571132611534848/1571132617211904/STEM/4e608247ac4e4c50a95e561208ee184e.png)
(Ⅰ)求数列
和
的通项公式;
(Ⅱ)设
,求数列
前n项和Tn.
![](https://img.xkw.com/dksih/QBM/2013/3/8/1571132611534848/1571132617211904/STEM/0d8bb1cad9b446c398e2e7480dc15795.png)
![](https://img.xkw.com/dksih/QBM/2013/3/8/1571132611534848/1571132617211904/STEM/09100b2c643947da8413509d249edee3.png)
![](https://img.xkw.com/dksih/QBM/2013/3/8/1571132611534848/1571132617211904/STEM/4e608247ac4e4c50a95e561208ee184e.png)
(Ⅰ)求数列
![](https://img.xkw.com/dksih/QBM/2013/3/8/1571132611534848/1571132617211904/STEM/0d8bb1cad9b446c398e2e7480dc15795.png)
![](https://img.xkw.com/dksih/QBM/2013/3/8/1571132611534848/1571132617211904/STEM/09100b2c643947da8413509d249edee3.png)
(Ⅱ)设
![](https://img.xkw.com/dksih/QBM/2013/3/8/1571132611534848/1571132617211904/STEM/a6dbc60126854310bc28487f9a0c68c6.png)
![](https://img.xkw.com/dksih/QBM/2013/3/8/1571132611534848/1571132617211904/STEM/435ac984c73d4b4bbe7d6e047e8daa04.png)
您最近一年使用:0次
2016-11-30更新
|
1047次组卷
|
9卷引用:2010年海南省海南中学高一下学期期中考试数学
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