حاصل $\underset{x\to -\infty }{\mathop{\lim }}\,\frac{\frac{۲}{{{x}^{۳}}}-۳x}{۲x+\frac{۳}{{{x}^{۴}}}}$ کدام است؟
$\underset{x\to -\infty }{\mathop{\lim }}\,\frac{\frac{2}{{{x}^{3}}}-3x}{2x+\frac{3}{{{x}^{4}}}}=\underset{x\to -\infty }{\mathop{\lim }}\,\frac{0-3x}{2x+0}=\frac{-3}{2}$