2021.2022

So sánh
A= 2 mũ 2020/2 mũ 2020+3 mũ 2021+3 mũ 2021/3 mũ 2021/5 mũ 2022+5 mũ 2022/5 mũ 2022+2 mũ 2020
B=1/1.2+1/3.4+1/5.6+....+1/2021.2022