ECZ 2018 · O-Level Paper 1 — Relations and Functions
Given that f(x) = 2x - 5 and g(x) = x + 3, find gf(3).
- A. 1
- B. 6
- C. 9
- D. 4
Verified working — step 1
In gf(3), the function nearest the input acts first: push 3 through f, then push the RESULT through 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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