Tính giới hạn lim x → − ∞ (2 x + 1)/( x + 1) .
Giải thích
Chọn C
\(\mathop {\lim }\limits_{x \to - \infty } \frac{{2x + 1}}{{x + 1}}\)\( = \mathop {\lim }\limits_{x \to - \infty } \frac{{2 + \frac{1}{x}}}{{1 + \frac{1}{x}}} = 2\).
Chọn C
\(\mathop {\lim }\limits_{x \to - \infty } \frac{{2x + 1}}{{x + 1}}\)\( = \mathop {\lim }\limits_{x \to - \infty } \frac{{2 + \frac{1}{x}}}{{1 + \frac{1}{x}}} = 2\).