lim(X趋向于+∞)[X/(1+X²)]^X

问题描述:

lim(X趋向于+∞)[X/(1+X²)]^X

取对数后求极限.
很明显,lim xln[x/(1+x^2)]=(+∞)ln0=(+∞)(-∞)= -∞
所以 ,原极限=e^[ lim xln[x/(1+x^2)] ]=e^(-∞)=0