4.1. Series and Convergence

Examples 4.1.5(b):

The series converges absolutely.

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The series of absolute values is equal to

and this series converges, as shown before. It is in fact a special case of the geometric series.

Hence, the series of absolute values converges, which by definition means that our series converges absolutely. Since absolute converge implies 'regular' convergence, the series also converges in its original form.

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