invers matriks P =(5-4 4-3 adalah

jawab

[tex] P=\, \left[\begin{array}{ccc}5&-4\\4&-3\end{array}\right] [/tex]

[tex] P^{-1}\,=\, \frac{1}{5(-3)- 4(-4)} \left[\begin{array}{ccc}-3&4\\-4&5\end{array}\right]\,[/tex]

[tex]P^{-1}\,=\, \frac{1}{-15+16} \left[\begin{array}{ccc}-3&4\\-4&5\end{array}\right]\,= 1 \left[\begin{array}{ccc}-3&4\\-4&5\end{array}\right]\,= \left[\begin{array}{ccc}-3&4\\-4&5\end{array}\right][/tex]