Ta có: 2000/2001 = 1 - 1/2001
2001/2002 = 1 - 1/2002
mà 1/2001 > 1/2002
--> 1 - 1/2001 < 1 - 1/2002
--> 2000/2001 < 2001/2002
Ta thấy: \(\frac{2000}{2001}=1-\frac{1}{2001}\)
\(\frac{2001}{2002}=1-\frac{1}{2002}\)
Vì: \(\frac{1}{2001}>\frac{1}{2002}\)
\(\Rightarrow\frac{2000}{2001}< \frac{2001}{2002}\)
Ta có:1-2000/2001=1/2001 1-2001/2002=1/2002
vì 1/2001>1/2002.Suy ra 2000/2001<2001/2002