Cho f(x) = 5; g(x) = - 2. Tìm lim

27/50

Cho\(\mathop {\lim }\limits_{x \to + \infty } f\left( x \right) = 5;\mathop {\lim }\limits_{x \to + \infty } g\left( x \right) = - 2\). Tìm \(\mathop {\lim }\limits_{x \to + \infty } \frac{{2f\left( x \right) + 1}}{{2 - 3g\left( x \right)}}.\)

\( - \frac{{11}}{8}.\)

\(\frac{{11}}{8}.\)

\(\frac{3}{4}.\)

\( - \frac{{11}}{4}.\)

Giải thích

Chọn B

\(\mathop {\lim }\limits_{x \to + \infty } \frac{{2f\left( x \right) + 1}}{{2 - 3g\left( x \right)}} = \frac{{2.5 + 1}}{{2 - 3.\left( { - 2} \right)}} = \frac{{11}}{8}\).