ECZ 2021 · O-Level Paper 1 — Relations and Functions
The functions f and g are defined by f(x) = x + 92and g(x) = x − 2. Find fg(x).
- A. x + 52
- B. x + 72
- C. x + 7
- D. x + 112
Verified working — step 1
fg(x) means f(g(x)) — apply g first. g(x) = x − 2, then f(x − 2) = ((x − 2) + 9)/2 = …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.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question