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Power Serieseasy
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For the power series ∑n=1∞(x−2)nn⋅3n\displaystyle \sum_{n=1}^{\infty} \frac{(x-2)^n}{n \cdot 3^n}n=1∑∞​n⋅3n(x−2)n​, use the ratio test to find the radius of convergence RRR.