Q75. What is the formula for the kth term of the series 1, (1+2), (1+2+3), ...?Mathematics — Sequences and Series — Question 75 of 208A. k(k+1)/2B. k(k+1)(2k+1)/6C. k2(k+1)2/4D. k2(2k2-1)Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →