Question

S= 2+2^2+2^3+.....+2^2018

tinh tong , giai chi tiet

ai giai truoc minh tick cho nhe

Answer 1

\(S=2+2^2+...+2^{2018}\)

\(2S=2^2+2^3+...+2^{2019}\)

\(\Rightarrow2S-S=2^{2019}-2\)

Answer 2

S = 2 + 2^2 + 2^3 + ...+ 2^2018

=> 2S = 2^2 + 2^3 + 2^4 + ...+ 2^2019

=> 2S-S = 2^2019 - 2

S = 2^2019 - 2

Answer 3

s=2+2^2+2^3+...+2^2018

=>2s=2^2+2^3+2^4+...+2^2019

=>2s-s=(2^2+2^3+2^4+...+2^2019)+(2+2^2+2^3+...+2^2018)

s=2^2019-2

chúc bạn học tốt ^-^