Bạn tham khảo:
Ta có:
2010 + 2011 + 2012 / 2011 + 2012 + 2013 = 2010 / 2011 + 2012 + 2013 + 2013/ 2011 + 2012 + 2013
Mà: 2010 / 2011 + 2012 + 2013 < 2010 / 2011.
2011 / 2011 + 2012 + 2013 < 2011 / 2012.
2012 / 2011 + 2012 + 2013 < 2012 / 2013.
=> 2010 / 2011 + 2011 / 2012 + 2012 / 2013 > 2010 + 2011 + 2012 / 2011 + 2012 + 2013.
=> P > Q.
Chúc bn học tốt!!!