mình làm 2004.2004+2004+1002/(2004+1)(2004+1)-100... = 2004.2004+2004+1002/
2004.2004+2004+2004+1-1003 =
2004.2004+2004+1002/2004.2004+2004+1002
=1
mình làm 2004.2004+2004+1002/(2004+1)(2004+1)-100... = 2004.2004+2004+1002/
2004.2004+2004+2004+1-1003 =
2004.2004+2004+1002/2004.2004+2004+1002
=1