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Mathematics 9 Online
OpenStudy (anonymous):

How do i find the Radius of convergence of: (-1)^n * (x^(3n)) / ((2n)!) from n=0 to inf

OpenStudy (amistre64):

take the limit of the ratio: an+1/an

OpenStudy (amistre64):

then solve that limit for: |f(x)| < 1

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