名校
1 . 已知数列
的各项均为正数,数列
,
满足
,
.
(1)若数列
为等比数列,求证:数列
为等比数列;
(2)若数列
为等比数列,且
,求证:数列
为等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931ac89254dc4bba73ec5ee9c62096c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74b4181f1484324833aea9115d0d4c2.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51f60dc33f7d8c08ec103b878c1be47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
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2016-12-03更新
|
615次组卷
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3卷引用:2015届江苏省广宇学校高三年级百强生竞赛文科数学试卷