Môn Toán (x-2021)/1+(x-2021)/2+(x-2019)/3+…+(x-1)/2021+x/2022=2022 29 Tháng Tám, 2023 1 Comment (x-2021)/1+(x-2021)/2+(x-2019)/3+…+(x-1)/2021+x/2022=2022