ECZ 2020 · O-Level Paper 1 — Relations and Functions
The functions f and g are defined by f(x) = 3x - 2 and g(x) = 4x + 1. Find (b) gf(x).
- A. 12x - 7
- B. 12x + 1
- C. 12x - 8
- D. 7x - 1
Verified working — step 1
gf(x) = g(f(x)) = 4(3x - 2) + 1 = 12x - 8 + 1 = …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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