LÊ TRẦN BÁCH
Giới thiệu về bản thân
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2023-10-11 21:43:23
\(S=1+2+2^2+2^3+...+2^{2017}\)
\(2S=2+2^2+2^3+2^4+...+2^{2017}+2^{2018}\)
\(2S-S=2+2^2+2^3+2^4+...+2^{2017}+2^{2018}-1+2+2^2+2^3+...+2^{2017}\)
\(S=\dfrac{2^{2018}-1}{2}\)