设
是等比数列
的前n项和,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6713772588d37a8cea676e36dfb7c87e.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ad03707bf583523192ae11fc27da07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6713772588d37a8cea676e36dfb7c87e.png)
20-21高三上·贵州铜仁·阶段练习 查看更多[4]
贵州省思南中学2021届高三上学期第二次月考数学(理)试题贵州省思南中学2021届高三上学期第二次月考数学(文)试题(已下线)专题18 等比数列——2020年高考数学母题题源解密(山东专版)(已下线)专题18 等比数列——2020年高考数学母题题源解密(海南专版)
更新时间:2020-10-10 13:32:43
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【知识点】 求等比数列前n项和
相似题推荐
填空题-单空题
|
较易
(0.85)
【推荐1】已知数列
共有
项,定义
的所有项和为
,第二项及以后所有项和为
,第三项及以后所有项和为
…,第
项及以后所有项和为
,若
是首项为1,公比为
的等比数列的前
项和,则当
时,
=__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d559ea59ae658fd00f0bb97f2521451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ebc33b118105bbb46aeb035fa754a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba8de1f13e31dbf101d796867ac375d.png)
![](https://img.xkw.com/dksih/QBM/2015/12/16/1572366703755264/1572366709227520/STEM/4300b241830f4c809639c7663990e55d.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25604acf458df2246bcd741388e5e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25604acf458df2246bcd741388e5e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2015/12/16/1572366703755264/1572366709227520/STEM/4300b241830f4c809639c7663990e55d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/12/16/1572366703755264/1572366709227520/STEM/6e1311f5d869443695a48bdb74915c44.png?resizew=41)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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填空题-单空题
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较易
(0.85)
【推荐2】等差数列
前
项和
,
,
,若
,则数列
的前
项和为________ .
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc91e27c7410472197be18c0ed2ebb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d565929f50b98dfc33637dc46b33b5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次