CAIE FP1 2013 November — Question 2

Exam BoardCAIE
ModuleFP1 (Further Pure Mathematics 1)
Year2013
SessionNovember
Topic3x3 Matrices

2 Show that the matrix \(\left( \begin{array} { r r r } 1 & 4 & 2
3 & 0 & - 2
3 & - 3 & - 4 \end{array} \right)\) has no inverse. Solve the system of equations $$\begin{array} { r } x + 4 y + 2 z = 0
3 x - 2 z = 4
3 x - 3 y - 4 z = 5 \end{array}$$