Question

sắp xếp theo thứ tự giảm dần: -1/2,3/-4,-2/3,4/-5

 

 

CỨU CÁI NÀY LÀ PHÂN SỐ

Answer 1

\(\dfrac{1}{2}=1-\dfrac{1}{2}\)

\(\dfrac{2}{3}=1-\dfrac{1}{3}\)

\(\dfrac{3}{4}=1-\dfrac{1}{4}\)

\(\dfrac{4}{5}=1-\dfrac{1}{5}\)

\(\dfrac{1}{2}>\dfrac{1}{3}>\dfrac{1}{4}>\dfrac{1}{5}\)

=>\(-\dfrac{1}{2}< -\dfrac{1}{3}< -\dfrac{1}{4}< -\dfrac{1}{5}\)

=>\(1-\dfrac{1}{2}< 1-\dfrac{1}{3}< 1-\dfrac{1}{4}< 1-\dfrac{1}{5}\)

\(\Leftrightarrow\dfrac{1}{2}< \dfrac{2}{3}< \dfrac{3}{4}< \dfrac{4}{5}\)

=>\(-\dfrac{1}{2}>-\dfrac{2}{3}>-\dfrac{3}{4}>-\dfrac{4}{5}\)