The first three terms of a progression are 128, 64, 32
MATHEMATICS · Subjective · A Level · Mathematics · Sequences and series · Sequences and series
Problem
The first three terms of a progression are 128, 64, 32.
(a) Verify that the terms form a geometric progression and state its common ratio.
(b) Find the sum of the first eight terms.
(c) Determine the least positive integer n for which the sum of the first n terms exceeds 255.