名校
解题方法
1 . 已知数列满足
,
,设
,记数列
的前
项和为
,数列
的前
项和为
,则( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-09-04更新
|
1278次组卷
|
5卷引用:江西省景德镇市乐平中学2023-2024学年高二下学期3月月考数学试题
2 . 已知数列
满足
.
(1)写出数列
的前4项
;
(2)记
,判断数列
是否为等差数列,并说明理由;
(3)求数列
的前30项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f574110a91fe097a386ded598b0e2937.png)
(1)写出数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/314501f06c7e4bf3112fe41ecac7be68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2023-03-24更新
|
497次组卷
|
2卷引用:江西省景德镇市乐平中学2022-2023学年高二下学期期中数学试题
名校
3 . 数列
满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2f03f58e3c85de45bd3fd86a8a66f7.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e5aa1c193f20c3b4cee25bfe88edd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2f03f58e3c85de45bd3fd86a8a66f7.png)
您最近一年使用:0次
名校
4 . 九连环是我国从古至今广泛流传的一种益智游戏,它用九个圆环相连成串,以解开为胜.据明代杨慎《丹铅总录》记载:“两环互相贯为一,得其关捩,解之为二,又合而为一”.在某种玩法中,用
表示解下n(
,
)个圆环所需的最少移动次数,若
,且
,则解下6个环所需的最少移动次数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6842fb24ab3b2235b66ca392ebcbc0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4ab0a5fa4a5d0d2ee2f4c93746ee39.png)
A.13 | B.15 | C.16 | D.29 |
您最近一年使用:0次
2022-01-27更新
|
393次组卷
|
8卷引用:江西省景德镇一中2022-2023学年高二(18班)上学期期中考试数学试题
名校
5 . 已知数列
满足:
(
),且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b25b8a72f0c66eb31b1200ac6eba05.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2a8fe48bbd9a1feaaa612ec6cfc829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b07c08df0b54583518085ae1e08632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b25b8a72f0c66eb31b1200ac6eba05.png)
您最近一年使用:0次
名校
解题方法
6 . 各项均为正数的数列
满足
,且
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316b5d6779890069e877f081d1833883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ba808c24aeae6a2f34b98ae5ec04ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331f9da19f6db7dc678a40aa21bf2839.png)
您最近一年使用:0次
2020-01-20更新
|
190次组卷
|
2卷引用:江西省景德镇市第一中学2021-2022学年高二上学期期中数学(文)试题