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WAEC Further Mathematics 2024 Objective — Question 12

Question 12 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2024 Objective paper, with the correct answer and a full explanation.

12. If p=(2;4) and q=(10;-1), find a vector r such that 2p-3r=q.

A. (-26;11)
B. (-2;3)Correct
C. (2;3)
D. (6;-9)

Explanation

2(2;4)-3r=(10;-1) => (4;8)-3r=(10;-1) => 3r=(4-10;8-(-1))=(-6;9) => r=(-2;3).

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