題組內容
8.Consider the power series 
in which the coefficients 
= 1, 2, 3, 1, 2, 3, 1, 2, 3, …are periodic of period p=3 .
2. Find the sum of this power series.
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8.Consider the power series in which the coefficients = 1, 2, 3, 1, 2, 3, 1, 2, 3, …are periodic of period p=3 .
2. Find the sum of this power series.