ECZ 2017 · GCE Paper 1 — Relations and Functions
The functions g and f are defined as g : x → x − 12 and f : x → 3x − 5. Find g-1(x).
- A. x + 12
- B. 2x − 1
- C. 2x + 1
- D. 12x + 1
Verified working — step 1
The inverse undoes g. The recipe: set y = g(x), make x the subject, then swap the letters back.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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