\(x\times2020-x=2020\times2018+2020\)
\(\Rightarrow x\times\left(2020-1\right)=2020\times\left(2018+1\right)\)
\(\Rightarrow x\times2019=2020\times2019\)
\(\Rightarrow x=2020\)
x * 2020 - x = 2020 * 2018 + 2020
x * 2020 - x * 1 = 2020 * 2018 + 2020 * 1
x * ( 2020 - 1) = 2020 * (2018 + 1)
x * 2019 = 2020 * 2019
Vậy x = 2020
2021/2018 x 2022 ... ... ... 2019/2020 x 2020
M=1+(1+2)+(1+2+3)+...+(1+2+3+...+2020)
1 x 2020+2 x 2019+3 x 2018+...+2020x1
Tính M
\(\dfrac{2018\times2020+2020\times2022}{2020\times4040}\)
tìm B = 2021 x 13 + 2009 + 2020 x 2007 / 2020 + 2020 x 520 x 2020
A= 2/2018*2020 + 2021/2020 - 2019/2018
giup em voi
giúp em với, em sẽ tick ạ
Tính nhanh 2020/2019 - 2019/2018 + 1/2019 x 2018
1×2020+2×2019+3×2018+....+2020×1
So sánh 2018/2019 + 2019/2020 + 2020/2021:3
A = 2018 + 2019/2019 + 2020 và B = 2018/2019 + 2019/2020
