Difference between revisions of "TDSM 8.1"
From The Data Science Design Manual Wikia
(Created page with "a) <math> A = \begin{bmatrix} 1 & 2\\ 2 & 3 \end{bmatrix} </math>, <math> B = \begin{bmatrix} -4 & 1\\ 1 & 0 \end{bmatrix} </math> <math> \Rightarrow AB = BA = \begin{bma...") |
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\end{bmatrix} | \end{bmatrix} | ||
</math> | </math> | ||
Latest revision as of 21:34, 10 December 2020
a) [math] A = \begin{bmatrix} 1 & 2\\ 2 & 3 \end{bmatrix} [/math], [math] B = \begin{bmatrix} 1 & 0\\ 0 & 1 \end{bmatrix} [/math]
[math] \Rightarrow AB = BA = \begin{bmatrix} -2 & 1\\ -5 & 2 \end{bmatrix} [/math]
b) [math] A = \begin{bmatrix} 0 & 1\\ 0 & 0 \end{bmatrix} [/math], [math] B = \begin{bmatrix} 1 & 0\\ 0 & 0 \end{bmatrix} [/math]
[math] \Rightarrow AB = \begin{bmatrix} 0 & 0\\ 0 & 0 \end{bmatrix}, BA = \begin{bmatrix} 0 & 1\\ 0 & 0 \end{bmatrix} [/math]
