Khi đó lim x → − ∞ f ( x ) bằng

C

\(\mathop {\lim }\limits_{x \to  - \infty } f\left( x \right) = \mathop {\lim }\limits_{x \to  - \infty } \frac{{{x^2} - x + 3}}{{3 - 2{x^2}}}\)\( = \mathop {\lim }\limits_{x \to  - \infty } \frac{{{x^2}\left( {1 - \frac{1}{x} + \frac{3}{{{x^2}}}} \right)}}{{{x^2}\left( {\frac{3}{{{x^2}}} - 2} \right)}} =  - \frac{1}{2}\).