1 . 已知数列{
}的首项为1,
为数列{
}的前n项和,
,其中q>0,
.
(Ⅰ)若
成等差数列,求数列{an}的通项公式;
(Ⅱ)设双曲线
的离心率为
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549b17fd03994ba73f3341b7189fc01b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d726666f99a5a41dd673a2330e377b17.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168d1aaf6b99875b3c5c84882978e364.png)
(Ⅱ)设双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e692bfc8107c4819e98af3f74c89db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f567549e66b339299dbf8369ab5812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17ceba8160ccefa3c4bccc749491dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7532aa134229978d1e36af60959d237.png)
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2016-12-04更新
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7卷引用:重庆市育才中学2020-2021学年高二上学期10月月考数学试题
重庆市育才中学2020-2021学年高二上学期10月月考数学试题2016年全国普通高等学校招生统一考试理科数学(四川卷精编版)(已下线)专题14 数列综合-五年(2016-2020)高考数学(文)真题分项(已下线)专题19 数列的求和问题-十年(2011-2020)高考真题数学分项(已下线)考点21 数列求和问题-2021年新高考数学一轮复习考点扫描(已下线)2016年全国普通高等学校招生统一考试理科数学(四川卷参考版)专题28数列解答题
2 . 已知正项数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)设
为数列
的前
项和,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/b8c60eaeb9de1df6ef4d92a57d251f5e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b18c830886c0fdb4e9863114489e2be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d4cfcd6d2101214c8414b7f42a7a5df.png)
您最近一年使用:0次