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1 . 设等比数列
的公比
,前
项和为
,则
的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f45f5bc7c648c0e8924b4fa7b1ad08.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/535cc0ae7869a42fbc58d12c02093f51.png)
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2021-01-09更新
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297次组卷
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4卷引用:江西省南昌市新建一中2021届高三上学期第二次月考数学(文)试题
江西省南昌市新建一中2021届高三上学期第二次月考数学(文)试题贵州省铜仁市思南中学2021届高三第十二次考试数学(理)试题贵州省铜仁市思南中学2021届高三第十二次考试数学(文)试题(已下线)第七章 数列专练5—等比数列前n项和-2022届高三数学一轮复习
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2 . 等比数列
中,
,
则数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f7968c10a5eec8f750b45eaa26cdeb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2348d5068480809ea002ebc2d3261b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2f0e4e43f5180eccf662c6a267b339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22615643f8ab9337dc40f469d64c89c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2348d5068480809ea002ebc2d3261b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f7968c10a5eec8f750b45eaa26cdeb.png)
您最近一年使用:0次
2019-04-14更新
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686次组卷
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4卷引用:2020届江西省南昌县莲塘第一中学高三上学期月考数学(理)试题
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解题方法
3 . 数列
满足
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acedd2bf1c2d169ddf3113a0bb292581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f966272f7781790ff27e40db6b525253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
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2020-03-04更新
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354次组卷
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2卷引用:上海市格致中学2016-2017学年高二上学期期中数学试题