名校
1 . 已知等比数列
的各项均为正数,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd771d3cbef216e9f8305226f08d777e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
A.4 | B.![]() | C.![]() | D.![]() |
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2024-03-07更新
|
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3卷引用:甘肃省白银市名校2023-2024学年高三下学期联合检测数学试题
2 . 已知正项等比数列
的前3项和为26,且数列
的前3项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed687b5e72317b508124642dd043d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
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2024-02-17更新
|
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3卷引用:甘肃省武威市凉州区2023-2024学年高二下学期开校质量检测数学试卷
甘肃省武威市凉州区2023-2024学年高二下学期开校质量检测数学试卷(已下线)专题03等比数列及其前n项和6种常考题型归类【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(北师大版2019选择性必修第二册)河南省驻马店市2023-2024学年高三上学期期末统一考试数学试题
解题方法
3 . 等比数列
的前
项和为
,下列结论正确的是__________ (填序号).
①若
,公比为
,则
;
②数列
一定是等比数列;
③数列
一定是等比数列;
④对任意正整数
;
⑤数列
一定是等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94351ce858fa3f3a09cfadc2d23d7253.png)
②数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3550967afc46107173c1c3b8acdc53.png)
③数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00dd05f91430b9a89e62beed9499919.png)
④对任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57ff738a95729d7b526386b0ad323c2.png)
⑤数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d9f7e125f35a2953bead1c36313bd2.png)
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名校
4 . 等比数列
中,
,
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d77060931748cee8c21b43d15033b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e85b39c5434fefdc035ee0329f2d4e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
A.![]() | B.![]() | C.1 | D.![]() |
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2022-12-29更新
|
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