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JAMB Mathematics 2013 Question 22

Question 22

Matrices and Determinants

If P = (5 3; 2 1) and Q = (4 2; 3 5), find 2P + Q. (Matrices written row by row.)

  1. A.(7 7; 8 14)
  2. B.(8 14; 7 7)
  3. C.(7 7; 14 8)
  4. D.(14 8; 7 7)
Show the answer and explanation

Answer: D ((14 8; 7 7))

Explanation

2P = (10 6; 4 2). Adding Q: (14 8; 7 7).