ECZ 2020 · O-Level Paper 1 — Sequences and Series
For the sequence 7, 11, 15, 19, ..., find the 9th term.
- A. 43
- B. 35
- C. 47
- D. 39
Verified working — step 1
First term a = 7, common difference d = 4. Tₙ = a + (n - 1)d, so T₉ = 7 + (9 - 1)×4 = 7 + 32 = …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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