没说极限过程,大概是x-->+∞
lim[x-->+∞]ln(e^x+1)/√(x^2+1)
=lim[x-->+∞][e^x/(e^x+1)]/[x/√(x^2+1)]
=lim[x-->+∞][1/(1+e^(-x))]/[1/√(1+1/x^2)]
=1
没说极限过程,大概是x-->+∞
lim[x-->+∞]ln(e^x+1)/√(x^2+1)
=lim[x-->+∞][e^x/(e^x+1)]/[x/√(x^2+1)]
=lim[x-->+∞][1/(1+e^(-x))]/[1/√(1+1/x^2)]
=1