x²-2x+√xy-2=-1
x²-2x+1+√xy-2=0
(x-1)²+√(xy-2)=0∴x-1=0
xy-2=0
∴x=1
y=2
1/xy+1/﹙x+1﹚﹙y+1﹚+.+1/﹙x+2010﹚﹙y+2010﹚
=1/1*2+1/2*3+1/3*4+……+1/2011*2012
=1-1/2+1/2-1/3+1/3-……-1/2011+1/2012-1/2012
=1-1/2012
=2011/2012