If \[A=\left[ \begin{matrix} -1 & 2 \\ 2 & -1 \\ \end{matrix} \right]\]and \[B=\left[ \begin{align} & 3 \\ & 1 \\ \end{align} \right],AX=B\], then \[X=\] [MP PET 2002]

\[\frac{1}{3}\left[ \begin{align} & 5 \\ & 7 \\ \end{align} \right]\]

\[\left[ \begin{align} & 5 \\ & 7 \\ \end{align} \right]\]

If \[A=\left[ \begin{matrix} -1 & 2 \\ 2 & -1 \\ \end{ma

1.	If \[A=\left[ \begin{matrix} -1 & 2 \\ 2 & -1 \\ \end{matrix} \right]\]and \[B=\left[ \begin{align} & 3 \\ & 1 \\ \end{align} \right],AX=B\], then \[X=\] [MP PET 2002]
A.	[5 7]
B.	\[\frac{1}{3}\left[ \begin{align} & 5 \\ & 7 \\ \end{align} \right]\]
C.	\[\frac{1}{3}[5\,\,7]\]
D.	\[\left[ \begin{align} & 5 \\ & 7 \\ \end{align} \right]\]
Answer» C. \[\frac{1}{3}[5\,\,7]\]

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If \[A=\left[ \begin{matrix} -1 & 2 \\ 2 & -1 \\ \end{matrix} \right]\]and \[B=\left[ \begin{align} & 3 \\ & 1 \\ \end{align} \right],AX=B\], then \[X=\] [MP PET 2002]

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