The first five terms of a sequence are 20, 18.5, 17, 15.5, 14.
MATHEMATICS · Multi-part · A Level · Mathematics · Sequences and series · Sequences and series
Problem
The first five terms of a sequence are 20, 18.5, 17, 15.5, 14.
(i) Show that the sequence is an arithmetic progression and determine its first term and common difference.
(ii) Find the 40th term of this progression.
(iii) Find the 100th term of this progression.