Lim - 2{x^3} - 3x + 3} bằng

Chọn C

\(\mathop {\lim }\limits_{x \to - \infty } \left( { - 2{x^3} - 3x + 3} \right) = + \infty \). Vì \(\mathop {\lim }\limits_{x \to - \infty } \left[ {{x^3}\left( { - 2 - \frac{3}{{{x^2}}} + \frac{3}{{{x^3}}}} \right)} \right] = + \infty \)và \(\mathop {\lim }\limits_{x \to - \infty } {x^3} = - \infty ;\mathop {\lim }\limits_{x \to - \infty } \left( { - 2 - \frac{3}{{{x^2}}} + \frac{3}{{{x^3}}}} \right) = - 2 < 0\)