数列
满足
,
,若
为等比数列,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999ac8c1ef39251e07a7fc54cbf7e26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c260abfcdb04d537fb7f2076f40d26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
20-21高二下·浙江·期中 查看更多[3]
浙江省衢温“5+1”2020-2021学年高二下学期期中联考数学试题(已下线)4.3.1-4.3.2 等比数列的概念及通项公式(课堂培优)-2021-2022学年高二数学课后培优练(苏教版2019选择性必修第一册)(已下线)专题5-1 等差等比性质综合-2
更新时间:2021-08-13 10:21:01
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单选题
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适中
(0.65)
【推荐1】已知正项等比数列
的前n项和为
,前n项积为
,满足
,则
取最小值时
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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A.4 | B.3或4 | C.4或5 | D.5 |
您最近一年使用:0次
【推荐2】已知数列
为等差数列,首项为2,公差为3,数列
为等比数列,首项为2,公比为2,设
,
为数列
的前
项和,则当
时,
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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A.8 | B.9 | C.10 | D.11 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】设
为正实数,数列
满足
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
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A.任意![]() ![]() ![]() |
B.存在![]() ![]() ![]() |
C.任意![]() ![]() ![]() |
D.存在![]() ![]() ![]() |
您最近一年使用:0次
单选题
|
适中
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解题方法
【推荐2】在各项均为正数的等差数列
中,
、
、
构成公比不为
的等比数列,
是
的前
项和.若
,
,则
的最小值为( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次