1 . 在
中,角
,
,
所对的边分别为
,
,
,已知角
为锐角,且
,
,
成等差数列,
,
,
成等比数列,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d2968cac30e4561d1551241e2f543d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdc3761a46608ac1a8ca5b5ab52a1c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
2 . 若△ABC的内角A、B、C所对的边a、b、c成等比数列,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2faef719ca2fc6f4eca081c33f2e5d1c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-20更新
|
926次组卷
|
4卷引用:重庆市万州第三中学2018-2019学年高一下学期期中数学试题
重庆市万州第三中学2018-2019学年高一下学期期中数学试题重庆市第一中学2018-2019学年高一下学期4月月考数学试题(已下线)期末综合检测03-2020-2021学年高一数学下学期期末专项复习(苏教版2019必修第二册)(已下线)专题01 《数列》中的典型题-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
12-13高二上·山东聊城·期中
名校
解题方法
3 . 已知等差数列
的首项
,公差
,且第二项、第五项、第十四项分别是一个等比数列的第二项、第三项、第四项.
(1)求数列
的通项公式;
(2)设
,
,是否存在最大的整数
,使得对任意的
均有
总成立?若存在,求出
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd5c41f7a34dc6df0e7c7dc666bce33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bfc73ca75d68bc8a4aed38d42fed32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227c74d0a68f9ad16ce36e9b20c1feaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2020-12-08更新
|
546次组卷
|
8卷引用:2014-2015学年重庆市万州二中高一4月月考文科数学试卷