\(\mathop {\lim }\limits_{x \to {0^ - }} \dfrac{1}...

Câu hỏi: \(\mathop {\lim }\limits_{x \to {0^ - }} \dfrac{1}{x}\left( {\dfrac{1}{{x + 1}} - 1} \right)\) bằng:

A \( - \infty \)  

B \( + \infty \)   

C \( - 1\) 

D  \( - 2\)