lim(x趋于0)(1-cosx)/[ln(1+x)(e^x-1)]

问题描述:

lim(x趋于0)(1-cosx)/[ln(1+x)(e^x-1)]

x趋于0时 1-cosx可替换为x^2/2 ln(1+x)可替换为x e^x-1可替换为x
lim(x趋于0)(1-cosx)/[ln(1+x)(e^x-1)]=lim(x趋于0)x^2/2x^2=1/2