ECZ 2013 · O-Level Paper 1 — Relations and Functions
A function h is defined as h(x) = (12)x - 5. Find h-1(x).
- A. x2 + 5
- B. 2x - 10
- C. 2x + 10
- D. x + 52
Verified working — step 1
The inverse undoes the rule in REVERSE order: the last thing done (subtract 5) is the first thing undone.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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