ECZ 2019 · GCE Paper 1 — Matrices
Given that R = 2-113 and S = 10-4-211, find RS.
- A. [2 0 4; −2 3 3]
- B. [4 1 −9; −5 3 −1]
- C. [0 −1 −9; 7 3 −1]
- D. [4 −1 −9; −5 3 −1]
Verified working — step 1
A (2 × 2) times a (2 × 3) gives a (2 × 3): each ROW of R runs down each COLUMN of S - six entries, one at a time, signs said aloud.The full step-by-step working and final answer, plus the video lesson for this topic, 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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