Thursday, September 20, 2018

real analysis - Trying to show that esumnk=01/k! goes to 0 faster than n! goes to infinity as ntoinfty

This have been asked before but I think people misunderstood my question.



For a better notation:

enk=01/k!=en .



Having the following inequality:



0<n!(en)<1/n



we can apply the squeeze theorem to show that n!(en) goes to zero as n goes to infinity.



If n!(en) goes to zero when n this means that n converges so quickly to e that (en) goes to 0 faster than n! goes to infinity as n.




Is possible to show this without relying on (1)?

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