名校
1 . 数列
的前
项和
满足
.
(1)求证:数列
是等比数列,并求
;
(2)若数列
为等差数列,且
,
,求数列
的前
项
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5174e1d9a2e6ed107985cebb7cc169dc.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb4a97e43f2d0ca1f982d6ee16ce803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfccafa83afe5ee21eab6ef2b2c8852.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ce13c5e30bf8a71f0e1248b02a69e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05201710afaf03630de3124ff5ec8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74f3aa327713a6fb1dabd01083c84a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
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2019-04-14更新
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6卷引用:宁夏银川一中2020-2021学年高一下学期期末数学试题