Narzędzia matematyczne

2015-04-26 14:36:32

Mnożenie macierzy

[\begin{matrix} 0.3 & -0.2 & -0.1 \\ -0.2 & 0.55 & -0.1 \\ -0.1 & -0.1 & 0.2 \end{matrix}] \times [\begin{matrix} 36 \\ 23 \\ 39 \end{matrix}] = [\begin{matrix} 0.3 \cdot 36 + -0.2 \cdot 23 + -0.1 \cdot 39 \\ -0.2 \cdot 36 + 0.55 \cdot 23 + -0.1 \cdot 39 \\ -0.1 \cdot 36 + -0.1 \cdot 23 + 0.2 \cdot 39 \end{matrix}] = [\begin{matrix} 2.3 \\ 1.55 \\ 1.9 \end{matrix}]