Find limn→∞∑k=1nnn2+k2π2\lim_{n \to \infty} \sum_{k=1}^n \frac{n}{n^2 + k^2 \pi^2}limn→∞∑k=1nn2+k2π2n.
1/π1/\pi1/π
1/21/21/2
1/41/41/4
2/π2/\pi2/π