lim(x→0)[sinx-x+x^3/6]/x^5 不用泰勒公式怎么做

问题描述:

lim(x→0)[sinx-x+x^3/6]/x^5 不用泰勒公式怎么做

lim(x→0)[sinx-x+x^3/6]/x^5
=lim(x→0)[cosx-1+x^2/2]/(5x^4)
=lim(x→0)[-sinx+x]/(20x^3)
=lim(x→0)[1-cosx]/(60x^2)
=lim(x→0)(x^2/2)/(60x^2)
=1/120