lim(x->0) (tan x-sin x)/√(2+x^2)(e^(x^3)-1)

lim(x->0) (e^x-1)=lim(x->0) x
所以lim(x->0) (e^(x^3)-1)=lim(x->0) x^3
lim(x->0) (tan x-sin x)=lim(x->0) sinx(1-cosx)/cosx
=lim(x->0) sinx*2[sin(x/2)]^2=lim(x->0) x*x^2/2=lim(x->0) x^3/2
(以上是利用无穷小量等价代换计算的结果,拆开来写看起来清楚)
lim(x->0) (tan x-sin x)/√(2+x^2)(e^(x^3)-1)
=lim(x->0) x^3/[(√2)*(x^3)/2]=(√2)/4