ECZ 2016 · O-Level Paper 1 — Relations and Functions
Given f(x) = (5x + 4)⁄5 and g(x) = x − 1, find fg(x) in its simplest form.
- A. (5x − 1)⁄5
- B. (5x + 3)⁄5
- C. (5x − 1)
- D. (x + 3)⁄5
Verified working — step 1
fg(x) = f(x − 1) = (5(x − 1) + 4)⁄5 = (5x − 5 + 4)⁄5 = …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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