Edexcel C2 2013 January — Question 9

Exam BoardEdexcel
ModuleC2 (Core Mathematics 2)
Year2013
SessionJanuary
TopicArea Under & Between Curves

9. \(y\) \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{6f31b6f1-33b5-4bca-9030-cf93760b454d-13_895_1308_207_294} \captionsetup{labelformat=empty} \caption{Figure 2}
\end{figure} The finite region \(R\), as shown in Figure 2, is bounded by the \(x\)-axis and the curve with equation $$y = 27 - 2 x - 9 \sqrt { } x - \frac { 16 } { x ^ { 2 } } , \quad x > 0$$ The curve crosses the \(x\)-axis at the points \(( 1,0 )\) and \(( 4,0 )\).
  1. Complete the table below, by giving your values of \(y\) to 3 decimal places.
    \(x\)11.522.533.54
    \(y\)05.8665.2101.8560
  2. Use the trapezium rule with all the values in the completed table to find an approximate value for the area of \(R\), giving your answer to 2 decimal places.
  3. Use integration to find the exact value for the area of \(R\).