Turnbull Guzman
12/03/2023 · High School
1. Hitunglah nilai determinan dari matriks-matriks berikut \( \mathbf{A}=\left[\begin{array}{rrr}3 & 1 & 2 \\ 1 & -2 & -6 \\ 4 & 3 & 1\end{array}\right] \quad \mathbf{B}=\left[\begin{array}{rrrr}4 & 0 & 0 & -2 \\ 1 & 1 & 1 & 0 \\ 1 & 4 & 0 & 3 \\ 2 & 2 & 7 & -4\end{array}\right] \quad \mathbf{C}=\left[\begin{array}{rrr}1 & 1 & 6 \\ 4 & -4 & -2 \\ 2 & 5 & 0\end{array}\right] \) 2. Tentukan semua minor yang terdapat pada masing-masing matriks di atas. 3. Bentuklah matriks kofaktor untuk masing-masing matriks tadi. 4. Bentuklah adjoin dari matriks-matriks tersebut.
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\[
\text{det}(\mathbf{A}) = 45, \quad \text{det}(\mathbf{B}) = 46, \quad \text{det}(\mathbf{C}) = 174
\]
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