Question

( 1 - 1/2023 )nhân( 1 - 1/2022 )nhân( 1 - 1/2021

 

Answer 1

 \(\left(1-\dfrac{1}{2023}\right).\left(1-\dfrac{1}{2022}\right).\left(1-\dfrac{1}{2021}\right)\)
= \(\dfrac{2022}{2023}.\dfrac{2021}{2022}.\dfrac{2020}{2021}\)
= \(\dfrac{2022.2021.2020}{2023.2022.2021}\)
= \(\dfrac{2020}{2023}\)