名校
解题方法
1 . 记等差数列
的前
项和为
,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/259ca0d421dd5f5022d126e46c76b26a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554e6c461ccc5aa3093c524aa528a4e2.png)
A.42 | B.52 | C.56 | D.60 |
您最近一年使用:0次
2 . 已知数列
满足
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660e7346a9d77510c28d75cb1ce6c497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
您最近一年使用:0次
3 . 已知各项均不为零的数列
满足
,其前n项和记为
,且
,数列
满足
.
(1)求
;
(2)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc54e3e1ca78f2921a40ee4be6e025b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f91b0b726eb892cc0e07a2fbf13c4d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2174a276296be785703c6995a29b7edd.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75730a463cb83995fcb524809d62d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2024-03-07更新
|
598次组卷
|
3卷引用:安徽省马鞍山市第二中学2023-2024学年高二下学期阶段性检测数学试题
名校
4 . 数列
满足
,前12项和为158,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5491164a81565a32285b5b652672486b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
您最近一年使用:0次
5 . 已知数列
中,
,
(
).
(1)求数列
的通项公式;
(2)若对于
,使得
恒成立,求实数
的取值范围.
![](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/7c4a4a9972b8fcc995c7e3f7da40a7d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7703a7fb5662c11ed45755b2454fb039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
名校
解题方法
6 . 某校新建一个报告厅,要求容纳800个座位,第一排21个座位,从第2排起后一排都比前一排多两个位置,那么这个报告厅共有______ 排座位.
您最近一年使用:0次
名校
解题方法
7 . 已知数列
为等差数列,
,
,前
项和为
,数列
满足
,则下列结论正确的是( )
![](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/133b6f7a0d58b61da063f4b08d92e365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696d0e6b9013d2e5fdf3feb280c58e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4867dfd2b1fa71e386275fe0fed234.png)
A.数列![]() |
B.数列![]() |
C.数列![]() |
D.数列![]() |
您最近一年使用:0次
名校
8 . 已知等比数列
的前n项和为
,则下列说法一定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
您最近一年使用:0次
名校
9 . 已知数列
:0,2,0,2,0,现在对该数列进行一种变换,规则
:每个0都变为“2,0,2”,每个2都变为“0,2,0”,得到一个新数列,记数列
,
,且
的所有项的和为
,则以下判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade39917930a1e712e7df8e81109c29b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c31d3b4c5f6b4c5e473e88b07c0cb1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.![]() ![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-03-06更新
|
409次组卷
|
4卷引用:黑龙江省哈尔滨市第三中学校2023-2024学年高二下学期寒假验收考试数学试卷
名校
10 . 已知数列
为正项递增等比数列,
,
,则该等比数列的公比
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482b3e1a42db5373e0e3bab27d0df506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3569965d73c3d071305553882a1e170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
2024-03-06更新
|
765次组卷
|
3卷引用:黑龙江省哈尔滨市第三中学校2023-2024学年高二下学期寒假验收考试数学试卷