Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Let
A
=
(
k
1
2
3
4
5
6
7
8
)
A=\begin{pmatrix}k & 1 & 2\\ 3 & 4 & 5\\ 6 & 7 & 8\end{pmatrix}
A
=
k
3
6
1
4
7
2
5
8
. For which value of
k
k
k
is the matrix
A
A
A
singular? a)
k
=
4
k=4
k
=
4
b)
k
=
0
k=0
k
=
0
c)
k
=
−
4
k=-4
k
=
−
4
d)
k
=
−
2
k=-2
k
=
−
2
Browse the problem library