Question

So sánh 

-788/789 và -789/788

Answer 1

  Ta có: \(-\frac{788}{789}=1-\frac{1577}{789}\)

\(-\frac{789}{788}=1-\frac{1577}{788}\)

Mà \(\frac{1577}{789}< \frac{1577}{788}\Rightarrow-\frac{788}{789}>-\frac{789}{788}\)