a=√2012-√2010=(√2012-√2010)(√2012+√2010)/(√2012+√2010)=2/(√2012+√2010)b=√2011-√2009=(√2011-√2009)(√2011+√2009)/(√2011+√2009)=2/(√2011+√2009)因为√2012>√2011；√2010>√2009所以：√...