If \[\left[ \begin{matrix} 2 & 0 & 7 \\ 0 & 1 & 0 \\ 1 & -2 & 1 \\ \end{matrix} \right]\left[ \begin{matrix} -x & 14x & 7x \\ 0 & 1 & 0 \\ x & -4x & -2x \\ \end{matrix} \right]=\left[ \begin{matrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]then find the value of x

If \[\left[ \begin{matrix} 2 & 0 & 7 \\ 0 & 1 & 0 \\ 1 & -2 & 1 \\

1.	If \[\left[ \begin{matrix} 2 & 0 & 7 \\ 0 & 1 & 0 \\ 1 & -2 & 1 \\ \end{matrix} \right]\left[ \begin{matrix} -x & 14x & 7x \\ 0 & 1 & 0 \\ x & -4x & -2x \\ \end{matrix} \right]=\left[ \begin{matrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]then find the value of x
A.	\[\frac{1}{2}\]
B.	\[\frac{1}{5}\]
C.	No unique value of 'x'
D.	None of these
Answer» C. No unique value of 'x'

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If \[\left[ \begin{matrix} 2 & 0 & 7 \\ 0 & 1 & 0 \\ 1 & -2 & 1 \\ \end{matrix} \right]\left[ \begin{matrix} -x & 14x & 7x \\ 0 & 1 & 0 \\ x & -4x & -2x \\ \end{matrix} \right]=\left[ \begin{matrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \\ \end{matrix} \right]\]then find the value of x

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