2008（X+Y）的平方与2008│0.5Y-1│互为相反数则：2008（X+Y）^2+2008│0.5Y-1│=0x+y=0,0.5y-1=0y=2,x=-y=-2(X+Y)+[(X-Y)-XY]的Y次方-X/Y=0+[(-2-2)-(-2)*2]^2-(-2)/2=0+[-4+4]^2+1=0+0+1=1