T = \left[ {\begin{array}{*{20}c}
 7 & 1 & 0 \\
 2 & 0 & {1/2} \\
 1 & 0 & 0 \\

 \end{array} } \right],T^{ - 1} = \left[ {\begin{array}{*{20}c}
 0 & 0 & 1 \\
 1 & 0 & { - 7} \\
 0 & 2 & { - 4} \\

 \end{array} } \right]