Linear Algebra Quiz
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Consider the matrix
A
A
A
:
A
=
(
k
1
3
2
−
1
0
1
5
k
)
A = \begin{pmatrix} k & 1 & 3 \\ 2 & -1 & 0 \\ 1 & 5 & k \end{pmatrix}
A
=
k
2
1
1
−
1
5
3
0
k
For what value of
k
k
k
is the cofactor
C
23
C_{23}
C
23
equal to 13?
A
-14/5
B
-12/5
C
12/5
D
14/5
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