Q79. What is the sum of the first 20 terms of the series 1 × 32 + 2 × 52 + 3 × 72 + ... ?Mathematics — NUST Mock 10 — Question 79 of 200A. 178090B. 188090C. 168090D. 188000Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →