已知等比数列
中,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c315aac51d58443cd89767e4eefc09f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69260d4592da42206db333df18f223e9.png)
A.20 | B.17 | C.16 | D.15 |
更新时间:2023-04-13 20:31:56
|
【知识点】 等比数列下标和性质及应用
相似题推荐
单选题
|
较易
(0.85)
【推荐1】已知
为等比数列,若
,且
与
的等差中项为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e40778be6b90e9e04b8234419b3a8cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47bf269ab9edd83336b48f05d9f4ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】在各项均为正数的等比数列
中,若
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75399f4000f530faea28e078c118811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3428a0b8cbc44a31880e0a2806f7245.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次