Mathematics for IGCSE & O level - Vectors (Section 1 - No. 42)
If \(\vec{p} = \begin{bmatrix} -3 \\ 1 \end{bmatrix}\), then what is \( -\vec{p} \)?
\(\begin{bmatrix} 3 \\ -1 \end{bmatrix}\)
\(\begin{bmatrix} -3 \\ -1 \end{bmatrix}\)
\(\begin{bmatrix} 1 \\ -3 \end{bmatrix}\)
\(\begin{bmatrix} -1 \\ 3 \end{bmatrix}\)
Объяснение
Multiplying a vector by -1 reverses the direction.