2000017603
Level:
C
For what value of \(a\) is the determinant of the following matrix equal to \(14\)?
\[
\left (\array{
a & 1 & -1\cr
0 & 1& 3\cr
1 & 0 & 2\cr
} \right )
\]
\( a=5\)
\( a=6\)
\( a=9\)
The value of \(a\) does not belong to the set \(\{5;6;9\}\).