ECZ 2017 · GCE Paper 1 — Vectors In Two Dimensions
Given that a = [3; −4] (a column vector), find |a|.
- A. 5
- B. 7
- C. 25
- D. 1
Verified working — step 1
|a| = √(3² + (−4)²) = √(9 + 16) = √25 = …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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