This have been asked before but I think people misunderstood my question.
For a better notation:
e−∑nk=01/k!=e−∑n .
Having the following inequality:
0<n!(e−∑n)<1/n
we can apply the squeeze theorem to show that n!(e−∑n) goes to zero as n goes to infinity.
If n!(e−∑n) goes to zero when n→∞ this means that ∑n converges so quickly to e that (e−∑n) goes to 0 faster than n! goes to infinity as n→∞.
Is possible to show this without relying on (1)?
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