lim x → − 1 (x^3 + 2 x^2 + 1)/( 2 x^5 +1 ) bằng32/38\[\mathop {\lim }\limits_{x \to - 1} \frac{{{x^3} + 2{x^2} + 1}}{{2{x^5} + 1}}\,\]bằng \[ - 2.\]\[ - \frac{1}{2}.\]\[ - \frac{1}{2}.\]\[2.\].Giải thíchChọn A