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
Write y = 8x and make x the subject: x = y8. Swapping letters, f⁻¹(x) = …The full step-by-step working and final answer 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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