1 . 记
为等差数列
的前n项和,满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a16640bafbd55e8b30e7c6e662b04b.png)
(1)证明数列
是等比数列,并求出通项公式
;
(2)数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a16640bafbd55e8b30e7c6e662b04b.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c895d4ce5ce82ef9b311b9369b4de11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0496f142d8ae5acb06e83526eaa3ef87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2019-11-20更新
|
521次组卷
|
2卷引用:江苏省徐州市2019-2020学年高二上学期期中数学试题