题目12.极限lim_(ntoinfty)(n^2+1)/((n+1)(n^2)+4)= ( )A. 0B. 1C. 2D. infty12.极限$\lim_{n\to\infty}\frac{n^{2}+1}{(n+1)(n^{2}+4)}=$ ( )A. 0B. 1C. 2D. $\infty$题目解答答案A. 0