名校
1 . 已知数列
的前n项和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559a339fa0fd3c11f2e45fa9e9fe1693.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3783e69ef5a6a0af566ff4e21ccf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5730fc489344c43cc6250d4f1bb9c2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559a339fa0fd3c11f2e45fa9e9fe1693.png)
您最近一年使用:0次
2024-03-14更新
|
284次组卷
|
2卷引用:第八届高一试题(B卷)-“枫叶新希望杯”全国数学大赛真题解析(高中版)
2 . 设函数
,定义
,其中
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77909963a3c9d04e23e3cdeb3e53d7fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b7b8270b59233f2ba6625a3027e8d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5546b084a8595561d11cea46172e397b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2016-12-05更新
|
1172次组卷
|
5卷引用:山西省长治市2019-2020学年高三上学期九月份统一联考数学(文)试题
2014·江西宜春·一模
3 . 已知数列
满足
.
(1)若
成等比数列,求
的值.
(2)是否存在
,使数列
为等差数列?若存在,求出所有这样的
;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c7245eb95ad3a7a8adc04494724c8b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
您最近一年使用:0次
4 . 设函数
是公差为
的等差数列,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef408975cd662d380a56b53e6606303.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34c3abac7e5ec833a725b629c7b690d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c487fec20bd809e0baf5cb39afe8979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661eddfbfac1f57594dd1a49b64f4c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef408975cd662d380a56b53e6606303.png)
您最近一年使用:0次
2016-12-02更新
|
1364次组卷
|
6卷引用:2013届上海市奉贤区高考一模理科数学试卷