b: \(\dfrac{2000}{2001}=1-\dfrac{1}{2001}\)
\(\dfrac{2002}{2003}=1-\dfrac{1}{2003}\)
mà \(-\dfrac{1}{2001}< -\dfrac{1}{2003}\)
nên \(\dfrac{2000}{2001}< \dfrac{2002}{2003}\)
\(\dfrac{2001}{2000}=1+\dfrac{1}{2000}\)
\(\dfrac{2002}{2001}=1+\dfrac{1}{2001}\)
mà \(\dfrac{1}{2000}>\dfrac{1}{2001}\)
nên \(\dfrac{2001}{2000}>\dfrac{2002}{2001}\)