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)]

运用等价无穷小:1-cosx~1/2x^2,ln(1+x)~x,e^x-1)~x
lim(x→0)(1-cosx)/[ln(1+x)(e^x-1)]
=lim(x→0)1/2x^2/x^2
=1/2