Mathematics for IGCSE & O level - Vectors (Section 1 - No. 7)
If \( \vec{a} = \begin{bmatrix} 4 \\ 0 \end{bmatrix} \), and \( \vec{b} = 2\vec{a} \) , what are the components of \( \vec{b} \)?
\(\begin{bmatrix} 2 \\ 0 \end{bmatrix}\)
\(\begin{bmatrix} 8 \\ 0 \end{bmatrix}\)
\(\begin{bmatrix} 4 \\ 2 \end{bmatrix}\)
\(\begin{bmatrix} 0 \\ 8 \end{bmatrix}\)
Giải thích
Multiply each component of \( \vec{a} \) by 2