Year 12 Specialist (Unit 3 & 4)
Further matrices
Matrix solution of larger systems
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Questions
Question 1
196359
The system \(x+2y+z=4\), \(3x-y+2z=9\) and \(2x+y-z=1\) is written as \(A\mathbf{x}=\mathbf{b}\). Which matrix is the coefficient matrix \(A\)?
\(\begin{pmatrix}1 & 2 & 1\\ 3 & -1 & 2\\ 2 & 1 & -1\end{pmatrix}\)
\(\begin{pmatrix}1 & 3 & 2\\ 2 & -1 & 1\\ 1 & 2 & -1\end{pmatrix}\)
\(\begin{pmatrix}1 & 2 & 1\\ 3 & 1 & 2\\ 2 & 1 & 1\end{pmatrix}\)
\(\begin{pmatrix}1 & 2 & 4\\ 3 & -1 & 9\\ 2 & 1 & 1\end{pmatrix}\)
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