求f(x)在x=0的左右极限：f(x)=sin(1/x)(x>0),(x)=xsin(1/x)(x

Question

求f(x)在x=0的左右极限：f(x)= sin(1/x) (x>0) ,(x)=xsin(1/x) (x

Answer 1

右极限不存在,左极限等于0.