Additional Mathematics 0606 / Series / 3.413.41: AP fourth and ninth terms0606/11/O/N/22 — Question 5 · 6 marksMark as done · Save for later · Show all solutions(a)An AP has fourth term 252525 and ninth term 505050. Find the first term and common difference.[3]▸ Answer(b)Find the least number of terms for which the sum exceeds 25 00025\,00025000.[3]▸ Answer▸ Official mark scheme← 3.5: Geometric progression terms and arithmetic sum3.81: Product of binomial expansions: coefficients aaa and bbb →
