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1 . 已知正项数列
的前n项和为
,且对于任意
,有
,若a2=4,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245b83c92c872de9be0d8c078924daff.png)
_____ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c88c05c564a3fb65c334bf1b8302773.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7090724417f906e0d413e9b307265b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84df781c890580fcadb50d2539824393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245b83c92c872de9be0d8c078924daff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c88c05c564a3fb65c334bf1b8302773.png)
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2020-07-06更新
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268次组卷
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2卷引用:陕西省西安市铁一中学2022-2023学年高二上学期1月期末数学试题