用夹逼定理计算极限lim{(n^2+1)/(n^4+2*n-1)}
问题描述:
用夹逼定理计算极限lim{(n^2+1)/(n^4+2*n-1)}
答
Xn=0
Yn=(n^2+1)/(n^4+2*n-1)
Zn=(n^2+1)/(n^4-1)=1/(n^2-1)
Xn