Sequences & Series (id: 61338f184)

本题目来源于试卷: Sequences & Series，类别为 IB数学

[填空题]
The first three terms of a geof..sd1id 8+qdmy(x tmm.ls 8gxlnx27jetric sequence are $\ln x^{9}, \ln x^{3}, \ln x$ , for x>0 .
1. Find the common ratio.   
2. Solve $\sum_{k=1}^{\infty} 3^{3-k} \ln x=27$ . $a^b$ a =    b =   

参考答案:
空格1: 1/3  空格2: e  空格3: 2 


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