等比数列
中,
和
是方程
的两个根,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acbca4dcc52c40a4812256252367728.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e35eeaabd951fb09b2926807da3685b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab44bab7d586b371efa34f321301615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acbca4dcc52c40a4812256252367728.png)
更新时间:2021-03-31 12:08:01
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【知识点】 等比数列下标和性质及应用
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【推荐1】等比数列{an}满足an>0,且a2a8=4,则log2a1+log2a2+log2a3+…+log2a9=________ .
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【推荐2】已知数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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