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Mathematics
Problem
For the system of linear equations 3x + 4y − 5z = 2, −x + 2y + z = 0, 6x − 7y + 8z = −1, which of the following matrices is the coefficient matrix A? a)
(
3
−
1
6
4
2
−
7
−
5
1
8
)
\begin{pmatrix}3 & -1 & 6 \\ 4 & 2 & -7 \\ -5 & 1 & 8\end{pmatrix}
3
4
−
5
−
1
2
1
6
−
7
8
b)
(
3
4
−
5
−
1
2
1
6
−
7
8
)
\begin{pmatrix}3 & 4 & -5 \\ -1 & 2 & 1 \\ 6 & -7 & 8\end{pmatrix}
3
−
1
6
4
2
−
7
−
5
1
8
c)
(
3
4
2
−
1
2
0
6
−
7
−
1
)
\begin{pmatrix}3 & 4 & 2 \\ -1 & 2 & 0 \\ 6 & -7 & -1\end{pmatrix}
3
−
1
6
4
2
−
7
2
0
−
1
d)
(
3
4
5
1
2
1
6
−
7
8
)
\begin{pmatrix}3 & 4 & 5 \\ 1 & 2 & 1 \\ 6 & -7 & 8\end{pmatrix}
3
1
6
4
2
−
7
5
1
8
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