设数列{an}的前n项和为Sn,且Sn=(m+1)﹣man对于任意的正整数n都成立,其中m为常数,且m<﹣1.
(1)求证:数列{an}是等比数列;
(2)设数列{an}的公比q=f(m),数列{bn}满足:
,bn=f(bn﹣1)(n≥2,n∈N),求证:数列
是等差数列,并求数列{bnbn+1}的前n项和.
(1)求证:数列{an}是等比数列;
(2)设数列{an}的公比q=f(m),数列{bn}满足:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad52f656fd696d414911d7609bd6a24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30136113176ba7fe660e998d0873157.png)
10-11高三·新疆乌鲁木齐·阶段练习 查看更多[1]
(已下线)2012届新疆乌鲁木齐一中高三第一次月考文科数学试卷
更新时间:2016-12-01 01:04:40
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解答题-问答题
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适中
(0.65)
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【推荐1】已知
是一个单调递增的等差数列,且满足
,
,数列
的前
项和为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f393fed43b0e646af7041e188f031a30.png)
.
(1)求数列
的通项公式;(2)证明数列
是等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b44e84c378ba05c940d8e69b9c94c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82b67d4c44a0adf7eb7907731ee9629.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/f393fed43b0e646af7041e188f031a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d5fa85887816de29bcff4f143e3f0c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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【推荐2】设数列
满足:
.
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22cdc6a31914a18c7496852e011073b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d307ec71820b6536453fbdb5069da3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4fd0783713648310475c3d49bbc73c.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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【推荐1】已知数列
的前
项和为
,
,
,数列
为正项等比数列,
,
是
与
的等差中项.
(1)求
和
的通项公式:
(2)若
,求数列
的前
项和
;
(3)设
,求数列
的前
项和
.
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417d7b3013445acd984c6c0b2f1ea740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af23b4dcd54c4220e5d6fba2e057e846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f6714682274c31a328bf796e235900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae9eb9d42b97b8c45533f67ca9faad1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858e8ce2c229962074e1aac460b53651.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cfc60ecd82115a7c681dc0df034a35d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b7e4aee0c3b6151c40df0bc0d8fcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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【推荐2】已知数列{an}的前n项和为Sn,a1=1,an>0,且Sn=
(an+1)2.
(1)求{an}的通项公式;
(2)令cn=anan+1,求数列{an+
}前n项和Tn.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(1)求{an}的通项公式;
(2)令cn=anan+1,求数列{an+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e4bf3498e3f48658b21396c81ce641.png)
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