∵[ (x-y+1)^2+|2x+y+8| ]^0无意义
∴ (x-y+1)^2+|2x+y+8| =0
∴x-y+1=0
2x+y+8=0
∴x=-3
y=-2
∴(x+y)^(x-1)
=(-3-2)^(-3-1)
=(-5)^(-4)
=1/625
∵[ (x-y+1)^2+|2x+y+8| ]^0无意义
∴ (x-y+1)^2+|2x+y+8| =0
∴x-y+1=0
2x+y+8=0
∴x=-3
y=-2
∴(x+y)^(x-1)
=(-3-2)^(-3-1)
=(-5)^(-4)
=1/625