So sánh A=2008/2009+2009/2010

Câu hỏi :

So sánh $$\begin{gathered} A=\frac{2008}{2009}+\frac{2009}{2010}+\frac{2010}{2011} \\ và B=\frac{2008+2009+2010}{2009+2010+2011} \end{gathered}$$