Given m is a real number,and|1-m|=|m|+1,simplify an algebraic expression,then√m^2-2m+1=

题目

Given m is a real number,and|1-m|=|m|+1,simplify an algebraic expression,then√m^2-2m+1=

答案

D
|1-m|=|m|+1得m=<0