ECZ 2020 · O-Level Paper 1 — Relations and Functions
The functions f and g are defined by f(x) = 3x - 2 and g(x) = 4x + 1. Find (c) gf(-2).
- A. 31
- B. -31
- C. -17
- D. 17
Verified working — step 1
Using gf(x) = 12x - 7: gf(-2) = 12×(-2) - 7 = -24 - 7 = …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