ECZ 2025 · GCE Paper 1 — Sequences and Series
The formula for the nth term of an arithmetic progression is 2n − 3. Find the first term.
- A. 2
- B. −1
- C. −3
- D. 1
Verified working — step 1
Substitute n = 1 into the formula: T₁ = 2(1) − 3 = …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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