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)]
答
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