Edexcel CP AS 2018 June — Question 1

Exam BoardEdexcel
ModuleCP AS (Core Pure AS)
Year2018
SessionJune
Topic3x3 Matrices

1. $$\mathbf { M } = \left( \begin{array} { r r r } 2 & 1 & - 3
4 & - 2 & 1
3 & 5 & - 2 \end{array} \right)$$
  1. Find \(\mathbf { M } ^ { - 1 }\) giving each element in exact form.
  2. Solve the simultaneous equations $$\begin{array} { r } 2 x + y - 3 z = - 4
    4 x - 2 y + z = 9
    3 x + 5 y - 2 z = 5 \end{array}$$
  3. Interpret the answer to part (b) geometrically.
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