Question

calcule o limite da função f(x)=(x^2-64)/(x-8), quando x tende a se aproximar de 8.

Answer 1

$\lim_{x \to 8} \frac{x^2-64}{x-8}=\lim_{x \to 8} \frac{(x+8)(x-8)}{x-8}=\lim_{x \to 8} (x+8)=8+8=16$