1 \\ -1 & 3 \end{array}\right] \text {. The matrix } \left[\begin{array}{cc} 3 & -3 \\ 0 & 10 \end{array}\right] \left[\begin{array}{cc} 3 & 0 \\ 5 & 10 \end{array}\right] \left[\begin{array}{cc} 4 & 5 \\ 3 & 10 \end{array}\right] \left[\begin{array}{cc} -5 & 5 \\ 0 & 10 \end{array}\right]
Fig: 1
Fig: 2
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Fig: 7