(a-1)的平方+b-2的绝对值=0∴a-1=0b-2=0∴a=1b=21/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+...+1/(a+2012)(b+2012)=1/1×2+1/2×3+1/3×4+……+1/2013×2014=1-1/2+1/2-1/3+1/3-1/4+……+1/2013-1/2014=1-1/2014=2013/2014...