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$\underset{x\to -\infty }{\mathop{\lim }} \dfrac{3x+2}{2x-4}$ bằng

Câu hỏi: $\underset{x\to -\infty }{\mathop{\lim }} \dfrac{3x+2}{2x-4}$ bằng
A. $-\dfrac{1}{2}.$
B. $-\dfrac{3}{4}.$
C. 1.
D. $\dfrac{3}{2}.$
Ta có $\underset{x\to -\infty }{\mathop{\lim }} \dfrac{3x+2}{2x-4}=\underset{x\to -\infty }{\mathop{\lim }} \dfrac{3+\dfrac{2}{x}}{2-\dfrac{4}{x}}=\dfrac{3}{2}.$
Đáp án D.
 

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