ta có:\(1-\frac{2005}{2006}=\frac{1}{2006}\)
\(1-\frac{2006}{2007}=\frac{1}{2007}\)
vì 2006<2007
=>\(\frac{1}{2006}>\frac{1}{2007}\)
=>\(\frac{2005}{2006}>\frac{2006}{2007}\)
TA có : \(\frac{2005}{2006}=1-\frac{1}{2006}\)
\(\frac{2006}{2007}=1-\frac{1}{2007}\)
Vì \(\frac{1}{2007}<\frac{1}{2006}\) nên \(\frac{2006}{2007}>\frac{2005}{2006}\)