ECZ 2018 · GCE Paper 1 — Relations and Functions
Given that f(x) = 8x, find f-1(x).
- A. 8x
- B. −8x
- C. x8
- D. 18x
Verified working — step 1
The inverse UNDOES f - and it is a rearrangement, never a reciprocal. Multiplying by 8 is undone by dividing by 8.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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