ECZ 2017 · GCE Paper 1 — Relations and Functions
With g : x → x − 12 and f : x → 3x − 5, find g-1f(x).
- A. 2x + 63
- B. 3x − 62
- C. 6x − 9
- D. 6x − 11
Verified working — step 1
In g-1f(x), the function nearest to x acts first: apply f, then feed the result into g-1. So build g-1 first.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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