在等差数列
中,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0792ddff69985dd00d99e00113629e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abc464d1fbf913c77cc38c23e533548.png)
A.2 | B.3 | C.4 | D.5 |
更新时间:2023-03-25 17:50:18
|
相似题推荐
单选题
|
较易
(0.85)
【推荐1】已知各项均为正数的数列
是公差为2的等差数列,若数列
成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2305c9213a5110f9a18f1056f44aeff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb660fc643f0256f549e8d344fa832b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2305c9213a5110f9a18f1056f44aeff.png)
A.27 | B.81 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】在等差数列
中,
,则数列
的前11项的和
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a456b745ab7f828c59a9ee2d1760d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30eb42578f654fb61e826026d2199751.png)
A.8 | B.16 | C.22 | D.44 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐1】《数书九章》有这样一个问题:有5位士兵按从低到高站成一排(从低到高依次为甲、乙、丙、丁、戊),身高依次成等差数列,已知乙士兵的身高为5尺1寸,这五位士兵身高之和为26尺(1尺为10寸),则丁士兵的身高为( )
A.5尺2寸 | B.5尺3寸 | C.5尺4寸 | D.5尺5寸 |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】已知
均为等差数列,且
,
,
,
,则由
公共项组成新数列
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3859890e300f470dcf4a215249da07e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6abbd310bfce5fc6df04add486e95070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fde8b4ed7f638dea2bffbc17d0ac51b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2073e8d431b4364f737badfd0c058dc9.png)
A.18 | B.24 | C.30 | D.36 |
您最近一年使用:0次