Edexcel C3 2008 June — Question 3

Exam BoardEdexcel
ModuleC3 (Core Mathematics 3)
Year2008
SessionJune
TopicModulus function

3. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{f47675f8-a2c2-4c4c-b878-ffe15a95c19d-05_623_977_207_479} \captionsetup{labelformat=empty} \caption{Figure 1}
\end{figure} Figure 1 shows the graph of \(y = f ( x ) , x \in \mathbb { R }\).
The graph consists of two line segments that meet at the point \(P\).
The graph cuts the \(y\)-axis at the point \(Q\) and the \(x\)-axis at the points \(( - 3,0 )\) and \(R\). Sketch, on separate diagrams, the graphs of
  1. \(y = | f ( x ) |\),
  2. \(y = \mathrm { f } ( - x )\). Given that \(\mathrm { f } ( x ) = 2 - | x + 1 |\),
  3. find the coordinates of the points \(P , Q\) and \(R\),
  4. solve \(\mathrm { f } ( x ) = \frac { 1 } { 2 } x\).