ECZ 2017 · O-Level Paper 1 — Matrices
Given A = (3 2 1 ; 4 3 0) and B = (1 2 3 ; 3 2 1 ; 0 1 0), find AB as a single matrix.
- A. (6 7 10 ; 13 14 15)
- B. (9 11 11 ; 13 14 15)
- C. AB is not possible
- D. (9 13 ; 11 14 ; 11 15)
Verified working — step 1
A is 2×3 and B is 3×3, so AB is 2×3. Multiplying rows by …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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