Q99. The sum of the first n terms of an arithmetic series, denoted as Sn, is given by which formula?Mathematics — Sequences and Series — Question 99 of 208A. Sn = n/2(a1 + an)B. Sn = n/2(a1 - 1)C. Sn = a1 + an/2D. Sn = n(a1 + a2)Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →