ECZ 2026 · GCE Paper 1 — Sequences and Series
The first and seventh terms of an arithmetic progression are -11 and 13 respectively. Find the nth term.
- A. 4n - 11
- B. 4n - 15
- C. -11n + 4
- D. 4n + 15
Verified working — step 1
Find d first, then put a and d into the nth-term formula a + (n - 1)d and simplify.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.
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