ECZ 2024 · O-Level Paper 1 — Relations and Functions
Given that f(x) = 3x + 5 and g(x) = x + 43, find gf(x).
- A. x - 3
- B. x + 3
- C. 3x + 92
- D. 3x + 3
Verified working — step 1
In gf(x), the function written nearest to x acts first: work out f(x), then feed the whole result into g.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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