设
为数列
的前
项和,
.
(1)求证:数列
为等比数列;
(2)设
,求数列
前
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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd6bd3d346e9c72a8ef32437187b682.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fdac31ceae0c61534e226e9c4e7e30.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658854c5a3ec56805cb5ed41bd78c78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348294ad62247c186cd6cff03968d63f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
更新时间:2021-06-06 21:20:24
|
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