Question 2
Let $n$ be a fixed positive integer. Find the minimum value of
$$\frac{x_1^3+\cdots+x_n^3}{x_1+\cdots+x_n},$$
where $x_1,x_2,\ldots,x_n$ are distinct positive integers.
$$\frac{x_1^3+\cdots+x_n^3}{x_1+\cdots+x_n},$$
where $x_1,x_2,\ldots,x_n$ are distinct positive integers.