ECZ 2021 · GCE Paper 1 — Relations and Functions
The functions f and g are defined by f(x) = x − 34and g(x) = 2x + 1. Find fg(x).
- A. x − 14
- B. x − 12
- C. x + 22
- D. 2x − 54
Verified working — step 1
fg(x) means apply g first, then f. f(2x + 1) = ((2x + 1) − 3)/4 = 2x − 24= …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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