CAPE Pure Mathematics Unit 2 · May/June 2018 · Paper 1 · Question Q31

If \mathbf{M} = \begin{pmatrix} 1 & 3 & 3 \\ -2 & 4 & 1 \\ 0 & 5 & 6 \end{pmatrix}, the FIRST ROW of the co-factor matrix of \mathbf{M} is

1. (A)\begin{bmatrix} -19 & -12 & -10 \\ * & * & * \\ * & * & * \end{bmatrix}
2. (B)\begin{bmatrix} 1 & -2 & 0 \\ * & * & * \\ * & * & * \end{bmatrix}
3. (C)\begin{bmatrix} 19 & 12 & -10 \\ * & * & * \\ * & * & * \end{bmatrix}
4. (D)\begin{bmatrix} -1 & 2 & 0 \\ * & * & * \\ * & * & * \end{bmatrix}