1 . (1)设
,
,
都是正数,求证:
;
(2)证明:求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533937a08d1ed87594ac52c658be9649.png)
(2)证明:求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c19d94ff48082c1cd213c82c99abf0.png)
您最近一年使用:0次
2019-06-20更新
|
1180次组卷
|
4卷引用:江西省吉安市五校(安福二中、井大附中、泰和二中、遂川二中、吉安县第三中学)2021-2022学年高二3月联考数学(文)试题
2 . 已知
是数列
的前
项和,并且
,对任意正整数
,
,设
(
).
(1)证明:数列
是等比数列,并求
的通项公式;
(2)设
,求证:数列
不可能为等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b49e96784918dbe41ab69d2e9b64e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac8e1d60f036093acd1e8fb476226b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bce6187f3f11e0ceead8a645f5f9d32.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00d1795e012aaabce3abd71032768c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b012eae1fba2bfc0e4544867c2de814a.png)
您最近一年使用:0次
2018-01-06更新
|
963次组卷
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2卷引用:河南省南阳市2021-2022学年高二下学期期中质量评估数学(文)试题