In this question I found by using the method R( rad of conv. )= lim 1/(a_n)^(1/n) an n tend to infinity to be 2e^2. Am i right?
doubt on radius of convergence of a series
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sequences-and-series
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1No: $$\lim_{n \to \infty} ((n+1)^22^n)^{1/n}=2 \neq 2e^2$$ – 2017-01-31