Edexcel C2 2012 January — Question 6

Exam BoardEdexcel
ModuleC2 (Core Mathematics 2)
Year2012
SessionJanuary
TopicArea Under & Between Curves

6. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{42116a65-60ec-4dff-a05e-bab529939e1e-07_611_1326_280_310} \captionsetup{labelformat=empty} \caption{Figure 1}
\end{figure} Figure 1 shows the graph of the curve with equation $$y = \frac { 16 } { x ^ { 2 } } - \frac { x } { 2 } + 1 , \quad x > 0$$ The finite region \(R\), bounded by the lines \(x = 1\), the \(x\)-axis and the curve, is shown shaded in Figure 1. The curve crosses the \(x\)-axis at the point \(( 4,0 )\).
  1. Complete the table with the values of \(y\) corresponding to \(x = 2\) and 2.5
    \(x\)11.522.533.54
    \(y\)16.57.3611.2780.5560
  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 \(R\).