在等比数列
中,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0998e284be3caceed13fe99ab8e60d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f7dd6a4e2a74b8934a9fa178a9757e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d13078d5dcf0a09eb04e27cd2002724.png)
A.48 | B.72 | C.96 | D.112 |
23-24高三上·四川·阶段练习 查看更多[8]
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更新时间:2023-11-26 23:00:44
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【知识点】 等比数列的定义
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【推荐1】等差数列
的首项为
,公差不为
,若
、
、
成等比数列,则
前
项的和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】在等比数列
中,
,
,则公比q是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1a1d1d511681561f3797e79dc7589d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e514e950696ade46144b49a830d2326f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.2 | B.3 | C.4 | D.5 |
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