definite-integral

Question: $\underset{n\to \infty }{\mathop{\lim }}\,\sum\limits_{r=1}^{n}{\frac{1}{n}{{e}^{\frac{r}{n}}}}$is



1) $e+1$
2) $e-1$
3) $1-e$
4) $e$
Solution: Explanation: No Explanation
Summation of series by definite Integration

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