已知数列
满足
,
.
(1)求证:数列
是等比数列;
(2)求数列
的前10项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a39a62acb44e6b9fed11bfa6a15726.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a99cea888ac2157694bf0bc7f9062535.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
更新时间:2018-03-02 22:33:40
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【推荐1】已知首项为
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【推荐2】已知数列{an}中,
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【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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(Ⅱ)设
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解题方法
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【推荐1】把所有正整数按上小下大,左小右大的原则排成如图所示的数表,其中第
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解题方法
【推荐2】设数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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