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1 markPaper 1 · Multiple choiceUnit Vectors

CSEC Additional Mathematics · 2015 · Paper 1 · Question Q25

The vector \mathbf{a} is given as 5\mathbf{i} + 12\mathbf{j}. A unit vector parallel to \mathbf{a} is

  1. (A)15\mathbf{i} + 36\mathbf{j}
  2. (B)195\mathbf{i} + 468\mathbf{j}
  3. (C)\frac{1}{13}(5\mathbf{i} + 12\mathbf{j})
  4. (D)\frac{3}{13}(5\mathbf{i} + 12\mathbf{j})

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