名校
解题方法
1 . 已知等比数列
的公比为q,且
,能使不等式
成立最大正整数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30800bcb030cf5ee97d0e21fbbe8c368.png)
_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25f5acaaf9dfc03c3663f7fe6a19728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e59741529165c159d724644639241920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30800bcb030cf5ee97d0e21fbbe8c368.png)
您最近一年使用:0次
2 . 数列
满足
,设
,则数列
的前
项和
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b1c0296cca0d68f86f49dff0fb0337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb825f9831b2507778ec838c4d16ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次