Trong các giới hạn sau, giới hạn nào bằng \( + \infty \) ?
A.\(\mathop {\lim }\limits_{x \to - \infty } \frac{{{x^5} + {x^3} + 7}}{{2{x^3} - 2{x^2} + 1}}\)
B.\(\mathop {\lim }\limits_{x \to - \infty } \frac{{1 - 3{x^2} - {x^3}}}{{4{x^2} + 1}}\)
C.\(\mathop {\lim }\limits_{x \to - \infty } \frac{{{x^3} - 3{x^4} + 5}}{{x - {x^3} + 1}}\)
D.\(\mathop {\lim }\limits_{x \to - \infty } \frac{{3{x^2} - {x^6}}}{{1 + x - 5{x^2}}}\)
A.\(\mathop {\lim }\limits_{x \to - \infty } \frac{{{x^5} + {x^3} + 7}}{{2{x^3} - 2{x^2} + 1}}\)
B.\(\mathop {\lim }\limits_{x \to - \infty } \frac{{1 - 3{x^2} - {x^3}}}{{4{x^2} + 1}}\)
C.\(\mathop {\lim }\limits_{x \to - \infty } \frac{{{x^3} - 3{x^4} + 5}}{{x - {x^3} + 1}}\)
D.\(\mathop {\lim }\limits_{x \to - \infty } \frac{{3{x^2} - {x^6}}}{{1 + x - 5{x^2}}}\)
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Hóa Học lớp 12
