Question

A = 1 + 2 mũ 2 + 2 mũ 3 + 2 mũ 2021 + 2 mũ 2022 = bao nhiêu

Answer 1

2²⁰²¹ to lắm á:VVV

Answer 2

\(A=1+2^2+2^3+...+2^{2021}+2^{2022}\) 

\(\Rightarrow2A=2+2^3+2^4+...+2^{2022}+2^{2023}\)

\(\Rightarrow2A-A=\left(2+2^3+2^4+...+2^{2022}+2^{2023}\right)-\left(1+2^2+2^3+...+2^{2021}+2^{2022}\right)\)

\(\Rightarrow A=2^{2023}-1\)

Answer 3

bằng 2 mũ 4048 + 1