Cho \(\mathop {\lim }\limits_{x \to {x_0}} f\left( x \right) = L < 0\) và \(\mathop {\lim }\limits_{x \to {x_0}} g\left( x \right) = - \infty \). Kết quả nào dưới đây đúng?
\(\mathop {\lim }\limits_{x \to {x_0}} f\left( x \right).g\left( x \right) = - \infty \).
\(\mathop {\lim }\limits_{x \to {x_0}} f\left( x \right).g\left( x \right) = + \infty \).
\(\mathop {\lim }\limits_{x \to {x_0}} f\left( x \right).g\left( x \right) = M < 0\).
\(\mathop {\lim }\limits_{x \to {x_0}} f\left( x \right).g\left( x \right) = L\).
Giải thích
B
\(\mathop {\lim }\limits_{x \to {x_0}} f\left( x \right).g\left( x \right) = + \infty \).