lihatlah gambar berikut, tentukan nilai determinan C³
Jawab:
mattriks 2x2
determinan
pada soal
C = 2A + 3B
[tex]\sf C = 2\left[\begin{array}{ccc}3&2\\-1&1\end{array}\right] + 3\left[\begin{array}{ccc}-2&-1\\0&-3\end{array}\right] = \left[\begin{array}{ccc}0&1\\-2&7\end{array}\right][/tex]
det C = 0(7) - 1(-2)
det C =0 + 2
det C = 2
det C³ = 2 x 2 x 2 = 8
