Tính tổng S=1+2.2+3.2^2+4.2^3+...+2018.2^2017 S=2018.2^2017+1

A. $S={2018.2}^{2017}+1$

B. $S={2017.2}^{2018}.$

C. $S={2018.2}^{2018}.$

D. $S={2019.2}^{2018}+1.$