Mathematics for IGCSE & O level - Vectors (Section 1 - No. 21)
If \(3\vec{x} = \begin{pmatrix} 6 \\ 9 \end{pmatrix}\), what is \(\vec{x}\) ?
\(\begin{pmatrix} 2 \\ 3 \end{pmatrix}\)
\(\begin{pmatrix} 18 \\ 27 \end{pmatrix}\)
\(\begin{pmatrix} 3 \\ 4.5 \end{pmatrix}\)
\(\begin{pmatrix} 3 \\ 6 \end{pmatrix}\)
คำอธิบาย
\(\vec{x}\) = 1/3 * \(\begin{pmatrix} 6 \\ 9 \end{pmatrix}\) = \(\begin{pmatrix} 2 \\ 3 \end{pmatrix}\)