# Make me an integral

Calculus Level 3

$\lim_{n\to\infty}\left(\frac{1}{a+n}+\frac{1}{2a+n}+\frac{1}{3a+n}+\ldots+\frac{1}{na+n}\right)$

Find the "closed form result" of the limit above.

Here, $a\gt 0$ is an arbitrary constant such that the expression inside the limit is defined.

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