ECZ 2017 · O-Level Paper 1 — Relations and Functions
Given f(x) = 2x + 1 and g(x) = 5x − 1, find fg(−3).
- A. 29
- B. −29
- C. −31
- D. 31
Verified working — step 1
Using fg(x) = 10x − 1: fg(−3) = 10(−3) − 1 = −30 − 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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