Connect with experts and get insightful answers to your questions on IDNLearn.com. Discover reliable and timely information on any topic from our network of knowledgeable professionals.

Do these matrices have determinant [tex]$0, 1, 2$[/tex], or [tex]$3$[/tex]?

[tex]\[
A=\left[\begin{array}{ccc}
0 & 0 & 1 \\
1 & 0 & 0 \\
0 & 1 & 0
\end{array}\right]
\quad
B=\left[\begin{array}{ccc}
0 & 1 & 1 \\
1 & 0 & 1 \\
1 & 1 & 0
\end{array}\right]
\quad
C=\left[\begin{array}{ccc}
1 & 1 & 1 \\
1 & 1 & 1 \\
1 & 1 & 1
\end{array}\right]
\][/tex]


Sagot :

Let's determine the determinants of the given matrices [tex]\( A \)[/tex], [tex]\( B \)[/tex], and [tex]\( C \)[/tex].

Given matrices:
[tex]\[ A = \begin{pmatrix} 0 & 0 & 1 \\ 1 & 0 & 0 \\ 0 & 1 & 0 \end{pmatrix} \][/tex]
[tex]\[ B = \begin{pmatrix} 0 & 1 & 1 \\ 1 & 0 & 1 \\ 1 & 1 & 0 \end{pmatrix} \][/tex]
[tex]\[ C = \begin{pmatrix} 1 & 1 & 1 \\ 1 & 1 & 1 \\ 1 & 1 & 1 \end{pmatrix} \][/tex]

1. Determinant of Matrix [tex]\(A\)[/tex]:
[tex]\[ A = \begin{pmatrix} 0 & 0 & 1 \\ 1 & 0 & 0 \\ 0 & 1 & 0 \end{pmatrix} \][/tex]

After calculating the determinant, we find:
[tex]\[ \det(A) = 1 \][/tex]

2. Determinant of Matrix [tex]\(B\)[/tex]:
[tex]\[ B = \begin{pmatrix} 0 & 1 & 1 \\ 1 & 0 & 1 \\ 1 & 1 & 0 \end{pmatrix} \][/tex]

After calculating the determinant, we find:
[tex]\[ \det(B) = 2 \][/tex]

3. Determinant of Matrix [tex]\(C\)[/tex]:
[tex]\[ C = \begin{pmatrix} 1 & 1 & 1 \\ 1 & 1 & 1 \\ 1 & 1 & 1 \end{pmatrix} \][/tex]

After calculating the determinant, we find:
[tex]\[ \det(C) = 0 \][/tex]

Thus, the determinants of the matrices [tex]\( A \)[/tex], [tex]\( B \)[/tex], and [tex]\( C \)[/tex] are [tex]\( 1 \)[/tex], [tex]\( 2 \)[/tex], and [tex]\( 0 \)[/tex] respectively.