Límits
- \( \displaystyle \lim_{x \to 0} \frac{x+1}{x} \)
- \( \displaystyle \lim_{x \to \infty} \frac{x+1}{x} \)
- \( \displaystyle \lim_{x \to -\infty} \frac{x^2+x+1}{x+3} \)
- \( \displaystyle \lim_{x \to 1} \frac{x^2-1}{x-1} \)
- \( \displaystyle \lim_{x \to \infty} e^{-x} \)