The inverse of \[\left[ \begin{matrix} 1 & 2 & 3 \\ 0 & 1 & 2 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]is [EAMCET 1990]

\[\left[ \begin{matrix} 1 & 2 & 1 \\ 0 & 1 & 2 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]

\[\left[ \begin{matrix} 1 & -2 & 1 \\ 0 & 1 & -2 \\ 0 & 0 & 0 \\ \end{matrix} \right]\]

\[\left[ \begin{matrix} 1 & -2 & 1 \\ 0 & 1 & -2 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]

The inverse of \[\left[ \begin{matrix} 1 & 2 & 3 \\ 0 &

1.	The inverse of \[\left[ \begin{matrix} 1 & 2 & 3 \\ 0 & 1 & 2 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]is [EAMCET 1990]
A.	\[\left[ \begin{matrix} 1 & -2 & 1 \\ 0 & 1 & -2 \\ 0 & 0 & 0 \\ \end{matrix} \right]\]
B.	\[\left[ \begin{matrix} 1 & -2 & 1 \\ 0 & 1 & -2 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]
C.	\[\left[ \begin{matrix} 1 & 2 & 1 \\ 0 & 1 & 2 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]
D.	None of these
Answer» C. \[\left[ \begin{matrix} 1 & 2 & 1 \\ 0 & 1 & 2 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]

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