Adjoint
Concept 6 of 10 in Determinants
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Take A=[3143]A = \begin{bmatrix} 3 & 1 \\ 4 & 3 \end{bmatrix}A=[3413] and its adjoint [3−1−43]\begin{bmatrix} 3 & -1 \\ -4 & 3 \end{bmatrix}[3−4−13]. Their product is not III. What single number must you divide the adjoint by to get A−1A^{-1}A−1?
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