等比数列
的前
项和为
,已知
,
,
成等差数列,则
的公比为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3426cd62d18ce9a04dedb72173a399d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42a8fe2f3a9984ef3d1f41037cf4a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.2 | B.3 | C.![]() | D.![]() |
19-20高一下·湖南湘西·期末 查看更多[2]
更新时间:2020-09-20 07:55:41
|
相似题推荐
单选题
|
较易
(0.85)
名校
【推荐1】已知数列
为等差数列,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a776b945ce6eed91b44064bf8c679f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d156c42a13e4fef2118617c092909261.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】已知等差数列1,a,b,等比数列3,
,
,则该等差数列的公差为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7570c77bd375f4dfdffee64fce8d1a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8209449389d4d8eefbdf992e06a17d.png)
A.3或-3 | B.3或1 | C.3 | D.-3 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
解题方法
【推荐1】已知正项等比数列
的首项和公比相等,数列
满足
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6be466f2d5076f73be78bbe6aa1e43c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9645d2855d15b0a97c983134ee718d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6be466f2d5076f73be78bbe6aa1e43c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
【推荐2】等比数列
的各项均为正实数,其前n项和为
,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df1038200f2d97a52c716aab6c3bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939c3192f4fe7512daf9efc47a6a3bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
A.32 | B.31 | C.64 | D.63 |
您最近一年使用:0次