For the diagonal matrix

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

Problem

For the diagonal matrix A=(2000−10004)A=\begin{pmatrix}2&0&0\\0&-1&0\\0&0&4\end{pmatrix}, what is the (2,2)(2,2) element of A−1A^{-1}? (a) 44 (b) −1-1 (c) −14-\dfrac14 (d) 11

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