Edexcel C2 2011 January — Question 6

Exam BoardEdexcel
ModuleC2 (Core Mathematics 2)
Year2011
SessionJanuary
TopicArea Under & Between Curves

6. $$y = \frac { 5 } { 3 x ^ { 2 } - 2 }$$
  1. Complete the table below, giving the values of \(y\) to 2 decimal places.
    \(x\)22.252.52.753
    \(y\)0.50.380.2
  2. Use the trapezium rule, with all the values of \(y\) from your table, to find an approximate value for \(\int _ { 2 } ^ { 3 } \frac { 5 } { 3 x ^ { 2 } - 2 } \mathrm {~d} x\). \begin{figure}[h]
    \includegraphics[alt={},max width=\textwidth]{be8f9187-055a-476f-974d-22e8e16e9996-08_537_743_941_603} \captionsetup{labelformat=empty} \caption{Figure 2}
    \end{figure} Figure 2 shows a sketch of part of the curve with equation \(y = \frac { 5 } { 3 x ^ { 2 } - 2 } , x > 1\).
    At the points \(A\) and \(B\) on the curve, \(x = 2\) and \(x = 3\) respectively.
    The region \(S\) is bounded by the curve, the straight line through \(B\) and ( 2,0 ), and the line through \(A\) parallel to the \(y\)-axis. The region \(S\) is shown shaded in Figure 2.
  3. Use your answer to part (b) to find an approximate value for the area of \(S\).