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Find the limit

Source: 2019 Jozsef Wildt International Math Competition-W. 35

May 19, 2020
limit

Problem Statement

Calculatelimnn!(1+1n)n2+nnn+12\lim \limits_{n \to \infty}\frac{n!\left(1+\frac{1}{n}\right)^{n^2+n}}{n^{n+\frac{1}{2}}}