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4.11 Vectors (A-level only)

4.11 Vectors (A-level only)

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Question 14

The points AAA, B B\,B and C C\,C have position vectors

a=2i+3j−k\mathbf{a} = 2\mathbf{i} + 3\mathbf{j} - \mathbf{k}a=2i+3j−k, b=5i−j+2k\mathbf{b} = 5\mathbf{i} - \mathbf{j} + 2\mathbf{k}b=5i−j+2k, c=μi+11j+νk\mathbf{c} = \mu\mathbf{i} + 11\mathbf{j} + \nu\mathbf{k}c=μi+11j+νk

where μ \mu\,μ and ν \nu\,ν are constants.

a.

Find AB⃗\vec{AB}AB and ∣AB⃗∣\left|\vec{AB}\right|​AB​, giving the magnitude in exact form.

[3]
b.

Given that AC⃗\vec{AC}AC is parallel to AB⃗\vec{AB}AB, find the value of μ \mu\,μ and the value of ν\nuν.

[4]
c.

Hence write down the ratio AB:ACAB : ACAB:AC.

[1]
Markscheme

4.11 Vectors (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.11 Vectors (A-level only)

133 exam-style questions on WJEC A Level Maths 4.11 Vectors (A-level only), covering 4.11.1 Vectors (A-level only) and 4.11.2 Vectors (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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