ECZ 2014 · O-Level Paper 1 — Sequences and Series
For the sequence of figures shown, write an expression, in terms of n, for the perimeter of the nth figure.
- A. 2n + 6
- B. 4n − 4
- C. 4n
- D. 4n + 4
Verified working — step 1
First term 8, common difference 4: perimeter = 8 + (n − 1) × 4 = 4n + 4. Check n = 3: 4 × 3 + 4 = …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.
Search any past-paper question