a-1=0
ab-2=0
∴a=1
b=2
1/ab+1/(a+1)(b+1)+…+1/(a+2007)(b+2007)
=1/1*2+1/2*3+1/3*4+……+1/2008*2009
=1-1/2+1/2-1/3+1/3-……-1/2008+1/2009-1/2009
=1-1/2009
=2008/2009
a-1=0
ab-2=0
∴a=1
b=2
1/ab+1/(a+1)(b+1)+…+1/(a+2007)(b+2007)
=1/1*2+1/2*3+1/3*4+……+1/2008*2009
=1-1/2+1/2-1/3+1/3-……-1/2008+1/2009-1/2009
=1-1/2009
=2008/2009