OCR C3 2007 January — Question 8

Exam BoardOCR
ModuleC3 (Core Mathematics 3)
Year2007
SessionJanuary
TopicArea Under & Between Curves

8
\includegraphics[max width=\textwidth, alt={}, center]{1216a06e-7e14-48d7-a7ca-7acd8d71af5f-4_538_1443_262_351} The diagram shows the curve with equation \(y = x ^ { 8 } \mathrm { e } ^ { - x ^ { 2 } }\). The curve has maximum points at \(P\) and \(Q\). The shaded region \(A\) is bounded by the curve, the line \(y = 0\) and the line through \(Q\) parallel to the \(y\)-axis. The shaded region \(B\) is bounded by the curve and the line \(P Q\).
  1. Show by differentiation that the \(x\)-coordinate of \(Q\) is 2 .
  2. Use Simpson's rule with 4 strips to find an approximation to the area of region \(A\). Give your answer correct to 3 decimal places.
  3. Deduce an approximation to the area of region \(B\).