WAEC Further Mathematics 2013 Question 37

Question 37

Vectors

If V = (−2, 4) and U = (−1, 5) (column vectors), find |U + V|.

  1. A.3√10
  2. B.√82
  3. C.√46
  4. D.2√5
Show the answer and explanation

Answer: A (3√10)

Explanation

U + V = (−3, 9), |U + V| = √(9 + 81) = √90 = 3√10.