若|x+y-1|与|x-y+3|互为相反数,则(x+y)的2001次方=

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若|x+y-1|与|x-y+3|互为相反数,则(x+y)的2001次方=若|x+y-1|与|x-y+3|互为相反数,则(x+y)的2001次方=若|x+y-1|与|x-y+3|互为相反数,则(x+y)

若|x+y-1|与|x-y+3|互为相反数,则(x+y)的2001次方=
若|x+y-1|与|x-y+3|互为相反数,则(x+y)的2001次方=

若|x+y-1|与|x-y+3|互为相反数,则(x+y)的2001次方=
1

x+y-1=0
x-y+3=0
x=-1
y=2
(-1+2)2001=1