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    set of complex numbers

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    1.Find an example of a sequence an of complex numbers such that the series
    SUM a_n converges (conditionally), yet the series SUM a^(3)_n diverges.

    2.Determine the set of complex numbers z for which the series SUM(1â?'z^2)^n converges.

    SUM means sigma.

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    Solution Summary

    Determine the set of complex numbers from this case.