Question

so sánh: 72/-73 và 98/-99

Answer 1

\(\dfrac{72}{-73}=-0,98\)

\(\dfrac{98}{-99}=-0,98\)

\(\Rightarrow\dfrac{72}{-73}=\dfrac{98}{-99}\)

Answer 2

\(\dfrac{72}{-73}=\dfrac{-72}{73}=1-\dfrac{1}{73}\)

\(\dfrac{98}{-99}=\dfrac{-98}{99}=1-\dfrac{1}{99}\)

mà \(-\dfrac{1}{73}< -\dfrac{1}{99}\)

nên \(\dfrac{72}{-73}>\dfrac{98}{-99}\)