Ta có:\(\) \(\left(\sqrt{2012}-\sqrt{2011}\right)\left(\sqrt{2012}+\sqrt{2011}\right)=1\)
\(\left(\sqrt{2011}-\sqrt{2010}\right)\left(\sqrt{2011}+\sqrt{2010}\right)=1\)
Vì \(\left(\sqrt{2012}+\sqrt{2011}\right)>\left(\sqrt{2011}+\sqrt{2010}\right)\)
nên \(\left(\sqrt{2012}-\sqrt{2011}\right)< \left(\sqrt{2011}-\sqrt{2010}\right)\)
Vậy A<B.