ECZ 2016 · GCE Paper 1 — Relations and Functions
A function h is defined as h(x) = 3x + 24. Find h⁻¹(x).
- A. 4x − 23
- B. 3x + 24
- C. 43x + 2
- D. 4x + 23
Verified working — step 1
Let y = 3x + 24. Then 4y = 3x + 2, so x = 4y − 23. Swapping letters: h⁻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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