Q138. In the formula for the sum of an arithmetic series, Sn = (n/2)[2a + (n-1)d], what does the variable 'd' represent?Mathematics — Sequences and Series — Question 138 of 208A. Common ratioB. Common differenceC. Common multipleD. None of the abovePractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →