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Mathematics
Mathematics
Problem
If
A
=
[
1
2
x
3
−
1
2
]
A = \begin{bmatrix} 1 & 2 & x \\ 3 & -1 & 2 \end{bmatrix}
A
=
[
1
3
2
−
1
x
2
]
and
B
=
[
y
x
1
]
B = \begin{bmatrix} y \\ x \\ 1 \end{bmatrix}
B
=
y
x
1
be such that
A
B
=
[
6
8
]
AB = \begin{bmatrix} 6 \\ 8 \end{bmatrix}
A
B
=
[
6
8
]
, then : (1)
y
=
−
2
x
y = -2x
y
=
−
2
x
(2)
y
=
2
x
y = 2x
y
=
2
x
(3)
y
=
x
y = x
y
=
x
(4)
y
=
−
x
y = -x
y
=
−
x
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