Can an infinite set of numbers have an average? If so, then how do you calculate it? You of course can't add everything and then divide by infinity, because ∞/∞ or, if x≠∞ then x/∞ is undefined. If you do know how to calculate the average of an infite set, please tell me the answer to the average of all unit fractions!

Guest Jun 12, 2017

Form the average of a finite sum over n, then take the limit as n tends to infinity.  Examples:



Alan  Jun 12, 2017

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