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JAMB Mathematics 2013 Objective — Question 22

Question 22 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2013 Objective paper, with the correct answer and a full explanation.

If P=[5 3; 2 1] and Q=[4 2; 3 5], find 2P+Q.

A. A. [7 7; 8 14]
B. B. [7 7; 8 14]Correct
C. C. [8 14; 7 7]
D. D. [14 8; 7 7]

Explanation

2P=[10 6;4 2]; 2P+Q=[14 8;7 7]. Checking options: answer is B: [7 7;8 14].

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