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1 . 已知数列
为等比数列,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b470b7ffaaa87781a5415df9feff65b.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625be236f4bdedcd3227a7a5ffa254d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b470b7ffaaa87781a5415df9feff65b.png)
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2019-04-20更新
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609次组卷
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2卷引用:贵州省凯里市第一中学2019届高三下学期模拟考试《黄金卷三》数学(理)试题