ECZ 2024 · GCE Paper 1 — Sequences and Series
The sequence 20, 17, 14, ... is an arithmetic progression. Find the 9th term.
- A. -7
- B. -1
- C. -4
- D. 44
Verified working — step 1
The nth term of an arithmetic progression is Tn = a + (n - 1)d: start at the first term, then take (n - 1) steps of the common difference.The full step-by-step working and final answer, plus the video lesson for this topic, 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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