Trong các giới hạn sau, giới hạn nào đúng?
A.\(\mathop {\lim }\limits_{x \to - \infty } \dfrac{{3{x^2} + x - 2}}{{{x^2} + 1}} = - 3\)
B.\(\mathop {\lim }\limits_{x \to - \infty } \dfrac{{2{x^4} - x + 1}}{{2 - {x^2} - {x^4}}} = 2\)
C.\(\mathop {\lim }\limits_{x \to + \infty } \dfrac{{2{x^2} + x - 3}}{{{x^2} - x - 1}} = 3\)
D.\(\mathop {\lim }\limits_{x \to - \infty } \dfrac{{\sqrt {{x^2} - 4} }}{{x + 1}} = - 1\)
A.\(\mathop {\lim }\limits_{x \to - \infty } \dfrac{{3{x^2} + x - 2}}{{{x^2} + 1}} = - 3\)
B.\(\mathop {\lim }\limits_{x \to - \infty } \dfrac{{2{x^4} - x + 1}}{{2 - {x^2} - {x^4}}} = 2\)
C.\(\mathop {\lim }\limits_{x \to + \infty } \dfrac{{2{x^2} + x - 3}}{{{x^2} - x - 1}} = 3\)
D.\(\mathop {\lim }\limits_{x \to - \infty } \dfrac{{\sqrt {{x^2} - 4} }}{{x + 1}} = - 1\)
Loga
Hóa Học lớp 12
