等比数列的性质
若
为等比数列,公比为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e44ac9118b8f9b6177f178a655fb3a.png)
_______
(2)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f3247e615880b3cda21ade9d0eea0f.png)
_______ ,
(3)若_______ ,则
为等比数列.
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e44ac9118b8f9b6177f178a655fb3a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb679318d0c9819b82e51a1750b502a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f3247e615880b3cda21ade9d0eea0f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40ebba1ff31c193ff699fd53a5cd3d0.png)
23-24高二上·江苏·课后作业 查看更多[1]
(已下线)第4课时 课中 等比数列的概念与通项公式
更新时间:2023-09-09 17:38:24
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【推荐2】若数列
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【推荐1】我国古代数学名著《算法统宗》中有如下问题:“远望巍巍塔七层,红光点点倍加增,共灯三百八十一,请问尖头几盏灯?”原文意思是:一座7层塔共挂了381盏灯,且相邻两层中的下一层灯数是上一层灯数的2倍,问塔的顶层有多少盏灯?若塔的最中间一层有n盏灯,则n=_____ .
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【推荐2】设等比数列
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