558 views
0 votes
0 votes

2 Answers

0 votes
0 votes
$A$ is similar to the direct sum $B \oplus B \oplus B$ where $B$ is the inner $2 \times 2$ matrix with $1'$s on the diagonal and $2'$s on the other diagonal, so $det(A)= (det(B))^3=(-3)^3=-27.$

Related questions

0 votes
0 votes
1 answer
1
Parshu gate asked Dec 23, 2017
763 views
0 votes
0 votes
0 answers
2
Debargha Mitra Roy asked Dec 11, 2023
139 views
Find the basic feasible solutions of the system of equations :-$x_1+x_2+x_3=8,$$3x_1+2x_2=18,$$x_1,x_2,x_3≥ 0$
1 votes
1 votes
1 answer
3
srestha asked Nov 3, 2018
1,070 views
Inverse of this matrix$\begin{bmatrix} 2 &1 &1 \\ 3 &2 &1 \\ 2& 1 &2 \end{bmatrix}$will beA)$\begin{bmatrix} 3 &-4 &-1 \\ -1 &2 &0 \\ -1 &1 &1 \end{bmatrix}$B)$\begin{bma...
3 votes
3 votes
1 answer
4
Shubhanshu asked Jul 24, 2017
732 views
For the first one I have got -28 and 11 as the answer but for the matrix C I am not able to get the value of element c32.c31 = c33 = 6.