Indeterminate form?
Calculus
Level
4
\[\large \lim_{n\rightarrow \infty} \dfrac{1}{n} \displaystyle\sum_{r=1}^{2n} \dfrac{r}{\sqrt{n^2+r^2}} = \sqrt{a} - 1, \ \ \ \ \ \ \ a = \ ? \]
by
kritarth lohomi