The sum of the first terms of a sequence is given by
MATHEMATICS · Subjective · A Level · Mathematics · Sequences and series · Sequences and series
Problem
The sum Sn of the first n terms of a sequence is given by Sn=4n2−n.
(i) Show that the sequence formed by the individual terms is an arithmetic progression.
(ii) Find the first term and the common difference.
(iii) Determine the sum of the first 30 terms.
(iv) Which term of the sequence equals 283?