sigma ( n^(sqrt(n)) * z^n, n>= 1, z is complex)

how to find its radius of convergence, it tried the ratio test

but it doesnt work

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- Feb 29th 2008, 02:21 PMszpengchaofind its radius of convergence
sigma ( n^(sqrt(n)) * z^n, n>= 1, z is complex)

how to find its radius of convergence, it tried the ratio test

but it doesnt work - Feb 29th 2008, 07:08 PMmr fantastic
- Mar 1st 2008, 04:04 PMThePerfectHacker