Application of Taylor Theorem on Getting Limit with Substitution of Equivalence Infinitesimal

Getting limit with substitution of equivalence infinitesimal is a common,convenient and efficient way.But it's hard to get the equivalence infinitesimal.In this paper,we present a novel algorithm to get the equivalence infinitesimal using Taylor theorem,and the method to get limit with substitution of equivalence infinitesimal is also presented.