Mathematics 4024 · O Level · Vector geometry

Vector geometry — practice question

The diagram shows that $\overrightarrow{PQ} = 4\mathbf{p}$, $\overrightarrow{QR} = 3\mathbf{q}$ and $\overrightarrow{PT} = \mathbf{p} + 2\mathbf{q}$. Also, $\overrightarrow{QU} = \frac{2}{3}\overrightarrow{QR}$ and $\overrightarrow{PT} = \frac{2}{3}\overrightarrow{PS}$.
(a(i)(a))[1]

State, in the simplest form possible and using $\mathbf{p}$ and/or $\mathbf{q}$, $\overrightarrow{PS}$.

(a(i)(b))[2]

State, as simply as possible and in terms of $\mathbf{p}$ and/or $\mathbf{q}$, $\overrightarrow{SR}$.

(a(ii))[2]

Using vectors, state the name of the special quadrilateral $PQRS$ and justify your answer.

(a(iii))[2]

In its simplest form, find the ratio $|\overrightarrow{PQ}| : |\overrightarrow{SR}|$.

(b(i))[1]

With $\overrightarrow{AB} = \begin{pmatrix}3\\2\end{pmatrix}$, $\overrightarrow{BC} = \begin{pmatrix}6\\-2\end{pmatrix}$ and $\overrightarrow{CD} = \begin{pmatrix}-7\\-3\end{pmatrix}$, determine $\overrightarrow{AD}$.

(b(ii))[2]

Determine $|\overrightarrow{BC}|$.

(b(iii))[2]

Given that $E$ is the midpoint of $BC$, determine $\overrightarrow{AE}$.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: $\tfrac{3}{2}(p+2q)$

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