Question

> < =

\(\frac{-3}{4}.....\frac{4}{-5}\)

kb với mk nha

 

Answer 1

\(-\frac{3}{4}=-\frac{15}{20}\)

\(\frac{4}{-5}=-\frac{16}{20}\)

Do \(-15>-16\)

\(\Rightarrow-\frac{3}{4}>\frac{4}{-5}\)

Answer 2

So sánh \(\frac{-3}{4}........\frac{4}{-5}\) hay \(\frac{-3}{4}.......\frac{-4}{5}\)

Ta có :

\(1+\frac{-3}{4}=\frac{1}{4}\)

\(1+\frac{-4}{5}=\frac{1}{5}\)

Vì \(\frac{1}{4}>\frac{1}{5}\Rightarrow1+\frac{-3}{4}>1+\frac{-4}{5}\Rightarrow\frac{-3}{4}>\frac{-4}{5}\)

\(\Rightarrow\frac{-3}{4}>\frac{4}{-5}\)

Vậy \(\frac{-3}{4}>\frac{4}{5}\)