\[\left| \,\begin{matrix} 13 & 16 & 19 \\ 14 & 17 & 20 \\ 15 & 18 & 21 \\ \end{matrix}\, \right|=\] [MP PET 1996]

\[\left| \,\begin{matrix} 13 & 16 & 19 \\ 14 & 17 & 20 \

1.	\[\left\| \,\begin{matrix} 13 & 16 & 19 \\ 14 & 17 & 20 \\ 15 & 18 & 21 \\ \end{matrix}\, \right\|=\] [MP PET 1996]
A.	0
B.	-39
C.	96
D.	57
Answer» B. -39

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\[\left| \,\begin{matrix} 13 & 16 & 19 \\ 14 & 17 & 20 \\ 15 & 18 & 21 \\ \end{matrix}\, \right|=\] [MP PET 1996]

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