问题
解答题
若|x+y-1|+(x-y+3)2=0,则(x+y)2009的值为多少?
答案
∵|x+y-1|+(x-y+3)2=0,
∴x+y-1=0且x-y+3=0,
解得x=-1,y=2.
∴(x+y)2009=(-1+2)2009=1.
若|x+y-1|+(x-y+3)2=0,则(x+y)2009的值为多少?
∵|x+y-1|+(x-y+3)2=0,
∴x+y-1=0且x-y+3=0,
解得x=-1,y=2.
∴(x+y)2009=(-1+2)2009=1.