Which one of the following matrices is singular?

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

Problem

Which one of the following 2×22\times 2 matrices is singular? (a) (2136)\begin{pmatrix}2 & 1\\ 3 & 6\end{pmatrix} (b) (1236)\begin{pmatrix}1 & 2\\ 3 & 6\end{pmatrix} (c) (02−30)\begin{pmatrix}0 & 2\\ -3 & 0\end{pmatrix} (d) (1223)\begin{pmatrix}1 & 2\\ 2 & 3\end{pmatrix}

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