Cho hàm số \(y = \dfrac{3 }...

B

- Hướng dẫn giải

\(y = \dfrac{3}{{x - 2}}\)

TXĐ: \(D = R\backslash {\rm{\{ }}2\}\)

\(\left. \begin{array}{l}\mathop {\lim }\limits_{x \to {2^ + }} \dfrac{3}{{x - 2}} = + \infty \\\mathop {\lim }\limits_{X \to {2^ - }} \dfrac{3}{{x - 2}} = - \infty \end{array} \right\} \Rightarrow TCĐ:x = 2\)

\(\mathop {\lim }\limits_{x \to \pm \infty } \dfrac{3}{{x - 2}} = 0 \Rightarrow TCN y=0\)