已知正项等比数列
满足:
.
(1)求数列
的通项公式;
(2)记数列
的前
项为
,求证:对于任意正整数
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b028abd4d12a4cee380130a784530338.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27281b55e46e55c997e18c2add9e0a70.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/81c4120f4beaf45e52ea03351a1a9609.png)
更新时间:2016-12-03 23:22:35
|
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【推荐1】已知各项均为正数的等比数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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(2)令
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您最近一年使用:0次
【推荐2】已知数列
是各项均为正数的等比数列,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d19b1b2d297466fa2313f4d5f20d35.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73dce2c1f85be0668fbf9051fe6bebca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】在公差不为零的等差数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知数列
和
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3cdd6b648d867b1871e56f7c5e27bf.png)
.
(1)证明:
是等比数列;
(2)求数列{
}的前n项和
![](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/9c3cdd6b648d867b1871e56f7c5e27bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16a04905d2d3fccfdc9e8695eab4be0.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c394d7bd6be49f089aa78d2d4fd0a9cc.png)
(2)求数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6575b4090f91e452bb610a3437ef526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a60fab9ac1eb590b1e3a9b1567f570.png)
您最近一年使用:0次