\[\left| \,\begin{matrix} 11 & 12 & 13 \\ 12 & 13 & 14 \\ 13 & 14 & 15 \\ \end{matrix}\, \right|=\] [Karnataka CET 1991]

\[\left| \,\begin{matrix} 11 & 12 & 13 \\ 12 & 13 & 14 \

1.	\[\left\| \,\begin{matrix} 11 & 12 & 13 \\ 12 & 13 & 14 \\ 13 & 14 & 15 \\ \end{matrix}\, \right\|=\] [Karnataka CET 1991]
A.	1
B.	0
C.	-1
D.	67
Answer» C. -1

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\[\left| \,\begin{matrix} 11 & 12 & 13 \\ 12 & 13 & 14 \\ 13 & 14 & 15 \\ \end{matrix}\, \right|=\] [Karnataka CET 1991]

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