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So what does f(x) look like: f\begin{pmatrix} x_1\\ x_2\\ x_3\\ x_4\\ x_5\end{pmatrix}\, =\, \mathbf{y}\, =\, \begin{pmatrix} y_1\\ y_2\\ y_3\end{pmatrix}\, =\, \begin{pmatrix} a_{1,1}&...
Multivariable Math Question,...