在等差数列
中,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
A.6 | B.8 | C.16 | D.32 |
更新时间:2021-02-05 16:14:00
|
【知识点】 利用等差数列通项公式求数列中的项
相似题推荐
单选题
|
容易
(0.94)
解题方法
【推荐1】在数列
中
,且满足
.则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be16165bea01959eed9cd9826d7ca31f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2591cfb0bea25f09b91f875932fddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051c7adfe65a08d58dddd7443f38a274.png)
A.![]() | B.10 | C.![]() | D.20 |
您最近一年使用:0次
单选题
|
容易
(0.94)
【推荐2】已知等差数列
中,
与
的等差中项为8,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e84c30444f13d37ada78285dc4f83b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d868ad8750eefd545a4344594dd982d5.png)
A.6 | B.9 | C.12 | D.18 |
您最近一年使用:0次