名校
解题方法
1 . 已知数列
是公差为2的等差数列.
(1)若
成等比数列,求
的值;
(2)设
,数列
的前n项和为
.数列
满足
.记
,求数列
的最小项
(即
对任意
成立).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920ad6b9e7f1c2c4a5a3025ba57e71b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff6bd0b129ecb5c0ecfb3190a269ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9358ef249b920a98e761184e2cba45a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9fb36a51456d5f5f061a3c10c3ccff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db844dc31684da771e0a5dc2f5ece11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f203d39a87ac7a57a097abac7d6b5de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
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2021-03-26更新
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2卷引用:2016年上海市普通高中学业水平考试数学试题