1 . 在数列
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8467337eed9bb6d94c6c22c6d031839d.png)
(1)求证:数列
为等差数列;
(2)若数列
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8467337eed9bb6d94c6c22c6d031839d.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0576765ab587a93bf03e8d8a3cdf6cfb.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42dd12e4dc081149aabab9a7bc2e0e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d889ab052426a02bc71aeaae626e41.png)
您最近一年使用:0次
2018-07-17更新
|
2364次组卷
|
3卷引用:【全国市级联考】内蒙古包头市2017-2018年高一第二学期期末大联考数学试题
名校
2 . 等差数列
的前
项和为
.
(Ⅰ)求数列
的通项公式;
(Ⅱ)若数列
满足
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e559696653a8f8a87e7eec750de2e05.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
(Ⅱ)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8716dee1da2cfa24cd59288101d6ba45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
您最近一年使用:0次
2017-04-11更新
|
1220次组卷
|
3卷引用:【市级联考】内蒙古鄂尔多斯市2019届高三上学期期中考试数学(文)试卷
【市级联考】内蒙古鄂尔多斯市2019届高三上学期期中考试数学(文)试卷2016-2017学年黑龙江省齐齐哈尔市第一中学校高一3月月考数学(文)试卷(已下线)河南省实验中学2023-2024学年高三上学期第一次月考数学试题变式题15-18