WAEC - Further Mathematics (2007 - No. 28)
Given that \(P = \begin{pmatrix} 4 & 9 \end{pmatrix}\) and \(Q = \begin{pmatrix} -1 & -2 \\ 3 & 2 \end{pmatrix}\). Which of the following operations is possible?
\(QP\)
\(P^{2}\)
\(Q^{2}P\)
\(PQ\)
Spiegazione
A \(1 \times 2\) matrix can be multiplied by \(2 \times 2\) matrix to give a \(1 \times 2\) matrix.