Mathematics for IGCSE & O level - Vectors (Section 1 - No. 30)
If the position vectors of points A and B are \(\vec{a}\) and \(\vec{b}\) respectively, which of the following represents the vector \(\vec{BA}\)?
\(\vec{a} + \vec{b}\)
\(\vec{b} - \vec{a}\)
\(\vec{a} - \vec{b}\)
\(-(\vec{a} + \vec{b})\)
คำอธิบาย
\(\vec{BA} = \vec{OA} - \vec{OB} = \vec{a} - \vec{b}\)