Linear Algebra Fundamentals
Geometry of Linear Equations
Matrix - Vector Multiplication:
| 2 | -1 |
|---|---|
| -1 | 2 |
\[ \begin{bmatrix} x_{11} & x_{12} & x_{13} & x_{1n} \\ x_{21} & x_{22} & x_{23} & x_{2n} \\ x_{d1} & x_{d2} & x_{d3} & x_{dn} \\ \end{bmatrix} \]
| 2 | -1 |
|---|---|
| -1 | 2 |
\[ \begin{bmatrix} x_{11} & x_{12} & x_{13} & x_{1n} \\ x_{21} & x_{22} & x_{23} & x_{2n} \\ x_{d1} & x_{d2} & x_{d3} & x_{dn} \\ \end{bmatrix} \]