ECZ 2019 · GCE Paper 1 — Relations and Functions
The functions f and g are defined as f(x) = 2x + 1 and g(x) = 3x − 52. Find f⁻¹(x).
- A. x + 12
- B. 2x − 1
- C. x − 12
- D. 12x + 1
Verified working — step 1
Let y = 2x + 1 and make x the subject: y − 1 = 2x, so x = y − 12. Hence 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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