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 fg(4).
- A. 12
- B. 7
- C. 16
- D. 8
Verified working — step 1
Build the rule for fg first, then substitute. In fg(x) the function written nearest to x acts first: apply g, then feed the whole result into f.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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