Question

So sánh hai phân số:

2010/2009 và 2009/2010

Answer 1

Ta có

\(\dfrac{2010}{2009}>1\)

\(\dfrac{2009}{2010}< 1\)

\(\Rightarrow\)\(\dfrac{2010}{2009}>\dfrac{2009}{2010}\)

Vậy....

Answer 2

ta thấy 2009<2010

\(\Leftrightarrow2009^2< 2010^2\)

\(\Leftrightarrow\dfrac{2009}{2010}< \dfrac{2010}{2009}\)