ECZ 2023 · GCE Paper 1 — Sequences and Series

An Arithmetic Progression is given as 1, 7, 13, ... Find the sum of the first fifteen terms.

Verified working — step 1

a = 1, d = 6, n = 15

The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.

Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

Have a different question?

Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.