Given m is a real number,and|1-m|=|m|+1,simplify an algebraic expression,then√m^2-2m+1=
问题描述：
Given m is a real number,and|1-m|=|m|+1,simplify an algebraic expression,then√m^2-2m+1=
答
题目的中文意思是：已知m是实数，且|1-m|=|m|+1，化简代数式√m^2-2m+1=
根据已知条件，两边平方，得到
1+m^2-2m=|m|^2+1+2|m|
所以-2m=|m|
因此m所以√m^2-2m+1=-m-2m+1=-3m+1
答
D
|1-m|=|m|+1得m=