Question

已知m、n、p满足|2m|+m=0,|n|=n,p|p|=1.化简：|n|-|m-p-1|+|p+n|-|2n+1|.

Answer 1

俊狼猎英团队为您解答

|2m|+m=0,得m=0,

|n|=n,得n≥0,

p|p|=1,得p=1,

化简：|n|-|m-p-1|+|p+n|-|2n+1|

=n-2+(1+n)-(2n+2)

=n-2+2+1+n-2n-2

=-2