Evaluate $\lim_{n\to\infty} (\frac{3^\frac{1}{n}+4^\frac{1}{n}+5^\frac{1}{n}}{3})^n$

Question

$\lim_{n\to\infty} (\frac{3^\frac{1}{n}+4^\frac{1}{n}+5^\frac{1}{n}}{3})^n$

Sorry, I forget how to compute the limit, can anyone gives a hint, thanks a lot.