1. $$\lim_{n \to \infty} \left[ \frac{1 \times 2}{n^3} + \frac{2 \times 3}{n^3} + ... + \frac{n(n+1)}{n^3} \right]$$
2. $$\lim_{n \to \infty} \frac{1}{n} \left( \frac{1}{n} + \frac{2}{n} + \frac{3}{n} + ... + \frac{n-1}{n} \right)$$
“I never teach my pupils; I only attempt to provide the conditions in which they can learn.” ~ ALBERT EINSTEIN