名校
解题方法
1 . 在递增等比数列
中,
是其前
项和,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cf962f8801d1a4845df3720f685e3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed9b7ca162e0159cdcc191fde3f614a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
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2021-03-06更新
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498次组卷
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4卷引用:广西柳州市2021届高三第一次模拟考试数学(文)试题
2 . 设等比数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e0f51e738c44b88d2fce0c581c6e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
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2021-02-09更新
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3卷引用:广西平果市第二中学2020-2021学年高一下学期期中考试数学试题
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3 . 若等比数列
的各项均为正数且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1894b67d483f97ec4aff564a81cc6da2.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/975e18ef7e59bc76e681d291a525e348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1894b67d483f97ec4aff564a81cc6da2.png)
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2021-02-05更新
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3卷引用:广西桂林市2020-2021学年高二年级上学期期末数学(理)试题
4 . 设数列
中,
,
,则通项![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3741a2bb31c3b41fb76d7171b395fdef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2021-02-04更新
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4卷引用:广西南宁市邕宁高中2020-2021学年高二上学期期末考数学试题
广西南宁市邕宁高中2020-2021学年高二上学期期末考数学试题(已下线)第四章 数列(基础测评卷)-2020-2021学年高二数学单元复习(人教A版2019选择性必修第二册)人教B版(2019) 选修第三册 必杀技 第五章 5.1.2 数列中的递推四川省仁寿县文宫中学2022-2023学年高二上学期9月月考数学(文)试题
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解题方法
5 . 各项均为正数的等比数列,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b6d3d8134b1458cc26b22183ee742.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f9b40ce2b2dddd4bdbb09b2bcc866c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b6d3d8134b1458cc26b22183ee742.png)
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2021-01-23更新
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3卷引用:广西柳州市第二中学2020-2021年高二上学期期末考试数学(文)试题
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6 . 已知等比数列
的前
项和为
,则数列的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______________ .
![](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/edde9b4e25a82706e8c8339bb23462c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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7 . 在前n项和为
的等差数列
中,
,
,则数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f7519e1b1dd927bc634eedafc88820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2021-01-17更新
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2卷引用:广西崇左高级中学2020-2021学年高二上学期期末模拟数学(理)试题
8 . 正项等比数列
中,
,
,记
为
的前
项和.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81088ac6e8e86c1eaefd6d91a1737cad.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecb69b2dfcc6f6eb01f12e5a9a2becfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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2021-01-16更新
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4卷引用:广西玉林市、柳州市2021届高三第二次模拟考试数学(理)试题
9 . 设等比数列
的公比为2,前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b326c94e02d84a19bd6a12bf8e15ff.png)
________ .
![](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/16b326c94e02d84a19bd6a12bf8e15ff.png)
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6卷引用:广西北海市2021届高三第一次模拟考试数学(文)试题
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10 . 已知数列
中,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c6ce06c1cd6542d0bb2bedaf66b8cf.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d46e527415401665298f12bf1a5ef52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c6ce06c1cd6542d0bb2bedaf66b8cf.png)
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2020-12-03更新
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3卷引用:广西崇左高级中学2020-2021学年高二上学期期末模拟数学(理)试题