Two arithmetic progressions are defined as: Series X: first term 5
MATHEMATICS · Subjective · A Level · Mathematics · Sequences and series · Sequences and series
Problem
Two arithmetic progressions are defined as:
Series X: first term 5, common difference 4
Series Y: first term 8, common difference 2
Find the least positive integer n such that the sum of the first n terms of Series X exceeds the sum of the first n terms of Series Y.