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Question 48 - Week 1 Practice | Prasnya
Q48
00:00
5 Jun 2022
Q48.
The matrix representation to find
x
1
x_1
x
1
,
x
2
x_2
x
2
, and
x
3
x_3
x
3
is:
@passage
A
[
2
c
1
2
1
2
4
1
2
]
[
x
1
x
2
x
3
]
=
[
80
d
80
]
\begin{bmatrix}2&c&1\\2&1&2\\4&1&2\end{bmatrix}\begin{bmatrix}x_1\\x_2\\x_3\end{bmatrix}=\begin{bmatrix}80\\d\\80\end{bmatrix}
2
2
4
c
1
1
1
2
2
x
1
x
2
x
3
=
80
d
80
B
[
2
c
1
4
1
2
2
1
2
]
[
x
1
x
2
x
3
]
=
[
80
80
d
]
\begin{bmatrix}2&c&1\\4&1&2\\2&1&2\end{bmatrix}\begin{bmatrix}x_1\\x_2\\x_3\end{bmatrix}=\begin{bmatrix}80\\80\\d\end{bmatrix}
2
4
2
c
1
1
1
2
2
x
1
x
2
x
3
=
80
80
d
C
[
2
c
1
4
1
2
2
1
2
]
[
x
1
x
2
x
3
]
=
[
80
d
80
]
\begin{bmatrix}2&c&1\\4&1&2\\2&1&2\end{bmatrix}\begin{bmatrix}x_1\\x_2\\x_3\end{bmatrix}=\begin{bmatrix}80\\d\\80\end{bmatrix}
2
4
2
c
1
1
1
2
2
x
1
x
2
x
3
=
80
d
80
D
[
4
1
2
2
c
1
2
1
2
]
[
x
1
x
2
x
3
]
=
[
80
d
80
]
\begin{bmatrix}4&1&2\\2&c&1\\2&1&2\end{bmatrix}\begin{bmatrix}x_1\\x_2\\x_3\end{bmatrix}=\begin{bmatrix}80\\d\\80\end{bmatrix}
4
2
2
1
c
1
2
1
2
x
1
x
2
x
3
=
80
d
80
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