so sánh ; $\frac{2020}{2019}$ và $\frac{2022}{2021}$
2 câu trả lời
Ta có:
`**\frac{2020}{2019}`
`=\frac{2019+1}{2019}`
`=1+\frac{1}{2019}`
`**\frac{2022}{2021}`
`=\frac{2021+1}{2021}`
`=1+\frac{1}{2021}`
Mà `2019<2021`
`=>\frac{1}{2019}>\frac{1}{2021}`
`=>1+\frac{1}{2019}>1+\frac{1}{2021}`
`=>\frac{2020}{2019}>\frac{2022}{2021}`
Vậy `\frac{2020}{2019}>\frac{2022}{2021}`