ECZ 2022 · GCE Paper 1 — Relations and Functions
Given that f(x) = x - 4 and h(x) = 2x + 3, find h-1(x).
- A. x - 23
- B. 2x - 3
- C. x + 32
- D. x - 32
Verified working — step 1
The inverse undoes h. The recipe: swap x and y, then make y the subject.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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