Question Number 163040 by qaz last updated on 03/Jan/22
$$\underset{\mathrm{n}\rightarrow\infty} {\mathrm{lim}}\frac{\mathrm{n}!}{\mathrm{n}^{\mathrm{n}} }\left(\underset{\mathrm{k}=\mathrm{0}} {\overset{\mathrm{n}} {\sum}}\frac{\mathrm{n}^{\mathrm{k}} }{\mathrm{k}!}−\underset{\mathrm{k}=\mathrm{n}+\mathrm{1}} {\overset{\infty} {\sum}}\frac{\mathrm{n}^{\mathrm{k}} }{\mathrm{k}!}\right)=? \\ $$