yeneniasanchez yeneniasanchez 15-04-2019 Mathematics contestada Which answer represents the series in sigma notation?1 + 1/2 + 1/4 + 1/8 + 1/16 + 1/32 + 1/64 7A. ∑ 2^j-1 j=1 7B. ∑ 1/2(j+1) j=1 7C. ∑ 1/2 ^j-1 j=1 7D. ∑ 1/2j+1 j=1