Question

关于高阶无穷小小量o（x^2）+o(x^2)=?

Answer 1

由定义知limx->0 o(x^2)/x^2=0

limx->0 [o（x^2）+o(x^2)]/x^2=limx->0 o（x^2)/x^2+limx->0 o（x^2)/x^2=0+0=0

o（x^2）+o(x^2)=o（x^2)