Diketahui a = (-2 -3 1 2). Jika A.B = I maka B =...

jawab
A B  = I
B = A⁻¹


[tex]B \, = \frac{1}{det A} \left[\begin{array}{ccc}2&3\\-1&-2\end{array}\right] \, =\\ B\, = \frac{1}{-4+3} \left[\begin{array}{ccc}2&3\\-1&-2\end{array}\right] \, \\ B\, = \left[\begin{array}{ccc}-2&-3\\1&2\end{array}\right] \, [/tex]