For the matrix

MATHEMATICS · Single correct · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

For the matrix A=(123014560)A = \begin{pmatrix} 1 & 2 & 3 \\ 0 & 1 & 4 \\ 5 & 6 & 0 \end{pmatrix}, what is the entry in the second row and first column of A−1A^{-1}? (a) 1818 (b) 2020 (c) −20-20 (d) −18-18

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