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Matrix multiplication:
Enter two matrices that can be multiplied, with each element separated by a comma and each row ending with a semicolon.
Note that mathematical functions and variables are not supported.
Enter two matrices that can be multiplied, with each element separated by a comma and each row ending with a semicolon.
Note that mathematical functions and variables are not supported.
Current location：Linear algebra >Matrix multiplication >History of matrix multiplication
\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &1\ &-4\ &3\ \\ &2\ &0\ &-1\ \\ &1\ &2\ &0\ \end{pmatrix}\times \begin{pmatrix} &1\ &0\ &0\ \\ &0\ &3\ &-1\ \\ &0\ &-5\ &2\ \end{pmatrix}}\\ \end{aligned}
\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &\frac{1}{2}\ &0\ &\frac{1}{2}\ \\ &\frac{1}{2}\ &\frac{1}{2}\ &0\ \\ &0\ &\frac{1}{2}\ &\frac{1}{2}\ \end{pmatrix}\times \begin{pmatrix} &-\frac{1}{4}\ &\frac{1}{2}\ &0\ \\ &0\ &0\ &\frac{1}{2}\ \\ &\frac{1}{2}\ &0\ &0\ \end{pmatrix}}\\ \end{aligned}
\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &1\ &0\ &0\ \\ &0\ &-2\ &-1\ \\ &0\ &1\ &1\ \end{pmatrix}\times \begin{pmatrix} &3\ &6\ \\ &1\ &1\ \\ &2\ &-3\ \end{pmatrix}}\\ \end{aligned}
\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &-4\ &3\ \\ &3\ &-2\ \end{pmatrix}\times \begin{pmatrix} &10\ &1\ &-2\ \\ &-5\ &-3\ &7\ \end{pmatrix}}\\ \end{aligned}
\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &2\ &-1\ &-1\ \\ &2\ &-2\ &-1\ \\ &-1\ &1\ &1\ \end{pmatrix}\times \begin{pmatrix} &3\ &0\ &1\ \\ &1\ &1\ &0\ \\ &0\ &1\ &4\ \end{pmatrix}}\\ \end{aligned}
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\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &\frac{1}{2}\ &0\ &\frac{1}{2}\ \\ &\frac{1}{2}\ &\frac{1}{2}\ &0\ \\ &0\ &\frac{1}{2}\ &\frac{1}{2}\ \end{pmatrix}\times \begin{pmatrix} &-\frac{1}{4}\ &\frac{1}{2}\ &0\ \\ &0\ &0\ &\frac{1}{2}\ \\ &\frac{1}{2}\ &0\ &0\ \end{pmatrix}}\\ \end{aligned}
\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &1\ &0\ &0\ \\ &0\ &-2\ &-1\ \\ &0\ &1\ &1\ \end{pmatrix}\times \begin{pmatrix} &3\ &6\ \\ &1\ &1\ \\ &2\ &-3\ \end{pmatrix}}\\ \end{aligned}
\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &-4\ &3\ \\ &3\ &-2\ \end{pmatrix}\times \begin{pmatrix} &10\ &1\ &-2\ \\ &-5\ &-3\ &7\ \end{pmatrix}}\\ \end{aligned}
\begin{aligned}&\\ \color{black}{Calculate }& \color{black}{\ \ \begin{pmatrix} &2\ &-1\ &-1\ \\ &2\ &-2\ &-1\ \\ &-1\ &1\ &1\ \end{pmatrix}\times \begin{pmatrix} &3\ &0\ &1\ \\ &1\ &1\ &0\ \\ &0\ &1\ &4\ \end{pmatrix}}\\ \end{aligned}
First page << Page33 Page34 Page35 Page36 ... ... Page49 Page50 Page51 >> Last page 共51页
The properties of matrix multiplication:
(i) Combining Law: （A b）C=A（b C）
(ii) Distribution Law: A ( B + C ) = A B + A C either or ( A + B ) C = A C + B C .
(iii) λ ( A B ) = ( λ A ) B = A ( λ B ) .
Among them, A, B, and C are the matrices that make the multiplication of the above matrices meaningful, λ It's a number.