CAPE Pure Mathematics Unit 1 · 2008 (T&T) · Paper 1 · Question Q29
Given that \mathbf{p} = \begin{pmatrix} -2 \\ 3 \end{pmatrix} and \mathbf{r} = \begin{pmatrix} 5 \\ -2 \end{pmatrix}, then \mathbf{p} \cdot \mathbf{r} equals
- (A)
-20 - (B)
-16 - (C)
4 - (D)
8
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