Tìm lim x^2} - 2x - 3 / x + 1
Giải thích
Chọn C
\[\mathop {\lim }\limits_{x \to - 1} \frac{{{x^2} - 2x - 3}}{{x + 1}} = \mathop {\lim }\limits_{x \to - 1} \frac{{\left( {x + 1} \right)\left( {x - 3} \right)}}{{x + 1}} = \mathop {\lim }\limits_{x \to - 1} \left( {x - 3} \right) = - 4\]