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Dadas as matrizes A = \[\begin{pmatrix} 23 & 8 \\ -6 & -14 \end{pmatrix}\], B = \[\begin{pmatrix} 4 \\ 2 \end{pmatrix}\] e C = \[\begin{pmatrix} 7 & 5 & 9 \\ 0 & 7 & 8 \\ 1 & 2 & 7 \end{pmatrix}\], analisar os itens abaixo: I) AxB = \[\begin{pmatrix} 108 \\ -52 \end{pmatrix}\].
II) det(A) = -274 e det(C) = 208.