数列
的前
项和为
,满足
,其中,
,且
.
(1)证明:数列
是等比数列;
(2)记数列
的公比为
数列
满足
,求
的通项公式;
(3)记
,证明:
.
![](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/88e8b48635e802867737824ccbc4b31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7291e12a15398c1aada7fd796528125a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e5270c151c0c9de54dd93e9687372c.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94a7db36c4df7447be8c4482ba13e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4da53f21d08bfa163ab1c11a0c9c516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b74452dbdee3f6d0206e9a2b1e3d0a.png)
2013高三·黑龙江·竞赛 查看更多[1]
(已下线)2013年全国高中数学联赛黑龙江赛区预赛试题
更新时间:2018-12-14 20:57:37
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知函数
,数列
满足
,
.记
.
(1)证明:
为等比数列,并求数列
的通项公式;
(2)记
,求数列
的前
项和公式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e9683ea94d06644b7c6e3e3ccbd15f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0736457346c11dd6f458418a4f747ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c28def0d419a201a4a52c11f150a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35420c933a18d11fc49362edb04b1be8.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435c8bd362f1ec652b5969230cac2812.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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解答题-问答题
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适中
(0.65)
【推荐1】甲、乙两人轮流掷一枚均匀的硬币,谁先掷出正面,谁获胜.他们连玩了数局,并规定前一局的输家下一局先掷.若甲第1局先掷,则第6局甲获胜的概率是多少?
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