1,√(1-3a)+(8b-3)²=0,
则1-3a=8b-3=0,
得a=1/3,b=3/8,
³√(ab)=³√1/8=1/2;
2,Ix-√7I+(y+√1/7)²=0
则x-√7=y+√(1/7)=0,
即x=√7,y=-√7/7,
xy=-1,
(xy)^2011=(-1)^2011=-1.
1,√(1-3a)+(8b-3)²=0,
则1-3a=8b-3=0,
得a=1/3,b=3/8,
³√(ab)=³√1/8=1/2;
2,Ix-√7I+(y+√1/7)²=0
则x-√7=y+√(1/7)=0,
即x=√7,y=-√7/7,
xy=-1,
(xy)^2011=(-1)^2011=-1.