已知数列
是等比数列,且
则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f601702059ce03d1a3b990eec782ef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80746d5b004518f5732e672a3195d2da.png)
A.![]() | B.2 | C.3 | D.4 |
2024·宁夏石嘴山·三模 查看更多[2]
更新时间:2024-05-19 17:25:54
|
相似题推荐
单选题
|
较易
(0.85)
名校
【推荐1】有以下四个结论(
且
):
(1)
(2)
(3)
(4)
.其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae018fde08edf0539089f98c17e11ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd594e99f82b7736c44e18b2721e607f.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa988274fe531ccc496f2d688797669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852388a9328ae080aec073ea7e90ebdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd49ee8651b09eaad53916b1cc13a161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2cab93142a448e5b5de0cf47e3d528.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】已知{an}是等比数列,若an>0,且a2a4+2a3a5+a4a6=25,则a3+a5=( )
A.10 | B.25 | C.5 | D.15 |
您最近一年使用:0次