4. Diketahui A = [3 1 2 4] B= [0 1 -1 2] Tentukan matriks C berordo 2×2 yg memenuhi persamaan 2A-B+C=0
Jawab:
operasional matriks
Jika 2A - B + C = 0
C = B - 2A
[tex]\sf C = \left[\begin{array}{ccc}0&1\\-1&2\end{array}\right] - 2\left[\begin{array}{ccc}3&1\\2&4\end{array}\right][/tex]
[tex]\sf C = \left[\begin{array}{ccc}0&1\\-1&2\end{array}\right] - \left[\begin{array}{ccc}6&2\\4&8\end{array}\right][/tex]
[tex]\sf C = \left[\begin{array}{ccc}0-6&1-2\\-1-4&2-8\end{array}\right][/tex]
[tex]\sf C = \left[\begin{array}{ccc}-6&-1\\-5&-6\end{array}\right][/tex]
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