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1 Unit 1: Pure Mathematics A

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Question 323

It is given that a=4i−3j\mathbf{a} = 4\mathbf{i} - 3\mathbf{j}a=4i−3j and b=−2i+5j\mathbf{b} = -2\mathbf{i} + 5\mathbf{j}b=−2i+5j.

a.

Find ∣a∣|\mathbf{a}|∣a∣.

[1]
b.

Find ∣2a−b∣|2\mathbf{a}-\mathbf{b}|∣2a−b∣, giving your answer in exact form.

[3]
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1 Unit 1: Pure Mathematics A Questions

  1. A Level
  2. /Maths
  3. /1 Unit 1: Pure Mathematics A

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