1 - 2005/2006 = 1/1000;1- 2006/2007 = 1/2007
vì 1/2006 > 1/2007 suy ra 2005/2006 > 2006/2007
Ta có : 2006 = 2005 + 1
=> 2005 < 2005 + 1
=> 2005 < 2006
Tương tự 2007 = 2006 + 1
=> 2006 < 2006 + 1
=> 2006 < 2007
1 - 2005/2006 = 1/2006
1 - 2006/2007 = 1/2007
Vì 1/2006>1/2007 nên 2005/2006 < 2006 2007
1 - 2005/2006 = 1/2006;1 - 2006/2007=1/2007
vì 1 /2006 > 1/2007 suy ra 2005/2006 > 2006/2007
1-2005/2006=1/2006
1-2006/2007=1/2007
vì 1/2006<1/2007 nên 2005/2006<2006/2007