已知
是各项均为正数的等比数列,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406428582c7ebf5b29832326d6aea779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae6b68627024f835dfb885db2d943dc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135f5594b883c7f48b7b4287f43f2f53.png)
A.2 | B.3 | C.4 | D.5 |
更新时间:2024-05-23 09:37:45
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【推荐1】在正项等比数列
中,
,
,
的前
项和为
,前
项积为
,则满足
的最大正整数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9672dc9adb691f441a1b87a0bc28d854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462625b5f5d0a18bcd996ab5adbb136e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e4b256e4d4f3cc7b4f79bf17e3207a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】各项均为正数的等比数列
的前
项和为
,且
成等差数列,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6161ace02f444999d9ca46a60db5211e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
A.![]() | B.![]() ![]() | C.15 | D.![]() |
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【推荐1】现有12个圆,圆心在同一条直线上,从第2个圆开始,每个圆都与前一个圆外切,从左到右它们的半径的长依次构成首项为16,公比为
的等比数列,前3个圆如图所示.若点
分别为第3个圆和第10个圆上任意一点,则
的最大值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/86e63be3-9343-4ad3-b265-611da5f68415.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d87446c9ef0230285d9b08127fce5c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/86e63be3-9343-4ad3-b265-611da5f68415.png?resizew=164)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】“杨辉三角”是我国数学史上的一个伟大成就,是二项式系数在三角形中的一种几何排列.如图所示,去除所有为1的项,依此构成数列
,则此数列的前45项的和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec0077c8c64781cc160f4a248676fc8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/74578b9e-88b4-4143-a3c5-6e7487eef5cd.png?resizew=204)
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