Mathematics for IGCSE & O level - Vectors (Section 2 - No. 24)
If \( \vec{a} = \begin{bmatrix} 3 \\ -2 \end{bmatrix} \), what is \( -2\vec{a} \) equal to?
\(\begin{bmatrix} -6 \\ 4 \end{bmatrix}\)
\(\begin{bmatrix} 6 \\ -4 \end{bmatrix}\)
\(\begin{bmatrix} -1 \\ 0 \end{bmatrix}\)
\(\begin{bmatrix} 1 \\ -4 \end{bmatrix}\)
คำอธิบาย
Multiply each component by -2.