MathCalculus
Identify the Function Represented by the Following Power Series
Grouping each repeating sign block turns the three series into geometric sums: (x+x²−x³)/(1−x³), (x+x²−x³−x⁴)/(1−x⁴) = x(1+x)/(1+x²), and (x−x²−x³)/(1−x³), all for |x| < 1.
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