- #1
mateomy
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Linear transformation [itex]T:\,\mathbb{R}^3\,\to\,\mathbb{R}^4[/itex]
Find the standard matrix A for T
[tex]
T\left(x_1,x_2,x_3\right)\,=\,\left(x_1 + x_2 + x_3, x_2 + x_3, 3x_1 + x_2, 2x_2 + x_3\right)
[/tex]
[tex]
\mathbf{v}\,=\,\begin{bmatrix}
x_1\\
x_2\\
x_3
\end{bmatrix}\,\,\,\,T\left(\mathbf{v}\right)\,=\,T\,\begin{bmatrix}
x_1\\
x_2\\
x_3
\end{bmatrix}\,=\,\begin{bmatrix}
x_1 + x_2 + x_3\\
x_2 + x_3\\
3x_1 + x_2\\
2x_2 + x_3
\end{bmatrix}\,=\,\begin{bmatrix}
1 & 1 & 1\\
0 & 1 & 1\\
3 & 1 & 0\\
0 & 2 & 1
\end{bmatrix}
[/tex]Is that correct? I feel like I'm just walking down a blind alley with this problem. The text is sort of convoluted in this section and I can't seem to find any supplementary material that I feel is helpful.
Thanks.
Find the standard matrix A for T
[tex]
T\left(x_1,x_2,x_3\right)\,=\,\left(x_1 + x_2 + x_3, x_2 + x_3, 3x_1 + x_2, 2x_2 + x_3\right)
[/tex]
[tex]
\mathbf{v}\,=\,\begin{bmatrix}
x_1\\
x_2\\
x_3
\end{bmatrix}\,\,\,\,T\left(\mathbf{v}\right)\,=\,T\,\begin{bmatrix}
x_1\\
x_2\\
x_3
\end{bmatrix}\,=\,\begin{bmatrix}
x_1 + x_2 + x_3\\
x_2 + x_3\\
3x_1 + x_2\\
2x_2 + x_3
\end{bmatrix}\,=\,\begin{bmatrix}
1 & 1 & 1\\
0 & 1 & 1\\
3 & 1 & 0\\
0 & 2 & 1
\end{bmatrix}
[/tex]Is that correct? I feel like I'm just walking down a blind alley with this problem. The text is sort of convoluted in this section and I can't seem to find any supplementary material that I feel is helpful.
Thanks.