Question

Calcule o limite $\lim _{x\to \:-2}\:\frac{2x^3+x^2\:-5x+2}{x^3-4x}$

Answer 1

Vamos là.

lim x--> -2 (2x^3 + x^2 - 5x + 2)/(x^3 - 4x)

derivada

lim x-->-2 (6x^2 + 2x - 5)/(3x^2 - 4) =

(24 - 4 - 5)/(12 - 4) = 15/8