演習問題

${\displaystyle \left(\begin{array}{cc}a& b\\ c& d\end{array}\right)\left(\begin{array}{c}x\\ y\end{array}\right)}$

${\displaystyle \left(\begin{array}{cc}1& 3\\ 5& 7\end{array}\right)\left(\begin{array}{cc}8& 6\\ 4& 2\end{array}\right)}$

${\displaystyle \left(\begin{array}{cc}2& 3\\ 4& 5\end{array}\right)\left(\begin{array}{c}\begin{array}{ccc}6& 5& 4\end{array}\\ \begin{array}{ccc}3& 2& 1\end{array}\end{array}\right)}$

${\displaystyle \left(\begin{array}{ccc}a& b& c\end{array}\right)\left(\begin{array}{c}x\\ y\\ z\end{array}\right)}$

${\displaystyle \left(\begin{array}{c}a\\ b\\ c\end{array}\right)\left(\begin{array}{ccc}x& y& z\end{array}\right)}$