已知各项均为正数的数列
满足
,且
,则首项
所有可能取值中最大值为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809029f5fbe215e1bb83ae29c9e265be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e088c63db03810d6e21a3a88afed83e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
更新时间:2019-12-04 14:28:53
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