题目[例1.2.62](2016年2)设 (alpha )_(1)=x(cos sqrt (x)-1) (alpha )_(2)=sqrt (x)ln (1+sqrt [3](x)), (alpha )_(3)=sqrt [3](x+1)-1. 当-|||-arrow (0)^+ 时,以上3个无穷小量从低阶到高阶的排序是 ()-|||-(A)α1,α2,α3· (B)α2,α3,α1 (C)a2,a1,a3 (D)α3,α2,α1题目解答答案