问题 填空题
已知x,y为实数,且满足
1+x
-(y-1)
1-y
=0,那么x2011-y2011=______.
答案

1+x
-(y-1)
1-y
=0,

1+x
+(1-y)
1-y
=0,

∴x+1=0,y-1=0,

解得x=-1,y=1,

∴x2011-y2011=(-1)2011-12011

=-1-1,

=-2.

故答案为:-2.

单项选择题
单项选择题