Tính tổng S = 

Câu hỏi: Tính tổng S = $\frac{1}{2!2017!} +\hspace{0.17em}\frac{1}{4!2015!} +\hspace{0.17em}\frac{1}{6!2013!} + .... +\hspace{0.17em}\frac{1}{2016!3!}+\frac{1}{2018!}$

c

$B. S = \frac{2^{2018}}{2019!}$

$C. S = \frac{2^{2018} - 1}{2019}$

$D. S = \frac{2^{2018}}{2019}$