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Find the radius of convergence of the Series:

[tex]\sum_{i=1}^{\infty}\frac{(2n)!x^n}{(n!)^2}[/tex]

The attempt at a solution

I used the Ratio Test but I always get L = [tex]|\frac{2x}{n+1}|[/tex]

The answer is 1/4. I think im mistaking with factorial.

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# Homework Help: Find the radius of convergence

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