若在各项都为正数的等比数列
中,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c612fb2fed7c255a981cff9013063f4f.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9d05f7b616ecdf7d293bda76619c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c612fb2fed7c255a981cff9013063f4f.png)
更新时间:2018-02-14 19:54:16
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【知识点】 等比数列通项公式的基本量计算
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填空题-单空题
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适中
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【推荐1】(2017新课标全国Ⅲ理科)设等比数列
满足a1 + a2 = –1, a1 – a3 = –3,则a4 =___________ .
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填空题-单空题
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解题方法
【推荐2】已知
是等比数列,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff664696fe5c39733202fdf3b5f41cd.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294e41e71c4207c764c6a80f15fab7be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff664696fe5c39733202fdf3b5f41cd.png)
您最近一年使用:0次