1 . 已知数列
的前
项
.
(1)求数列
的通项公式;
(2)设
,求证:
.
![](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/6e7c1a9924023ce408b249a32dfd7fe0.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd87eb57d157e9a790245eb82d3a5f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce6ae3d06eb1ee79e87ef6c86080bca.png)
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2022-03-22更新
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8卷引用:吉林省长春市第二实验中学2022-2023学年高二上学期期末数学试题