Question

so sánh phân số 212121/232323 và 123123/124124

Answer 1

\(\dfrac{212121}{232323}=\dfrac{212121:10101}{232323:10101}=\dfrac{21}{23}\)

\(\dfrac{123123}{124124}=\dfrac{123123:1001}{124124:1001}=\dfrac{123}{124}\)

Ta có: \(1-\dfrac{21}{23}=\dfrac{2}{23}\) ; \(1-\dfrac{123}{124}=\dfrac{1}{124}=\dfrac{2}{248}\)

\(=>\dfrac{2}{23}>\dfrac{2}{248}\)

\(=>1-\dfrac{21}{23}>1-\dfrac{123}{124}\)

\(=>\dfrac{21}{23}< \dfrac{123}{124}\)

\(=>\dfrac{212121}{232323}< \dfrac{123123}{124124}\)