Mathematics 0580 · IGCSE · Vectors in two dimensions

Vectors in two dimensions — practice question

Here, $O$ denotes the origin, $\overrightarrow{OA} = \mathbf{a}$ and $\overrightarrow{OB} = \mathbf{b}$. Point $C$ lies on the straight line $AB$ with $AC : CB = 1 : 2$. The diagram is NOT TO SCALE.
(a)[2]

Find $\overrightarrow{AC}$, in terms of $\mathbf{a}$ and $\mathbf{b}$, in its simplest form.

(b)[2]

Find the position vector for $C$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: Correct result $\frac{1}{3}(-a+b)$

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI