OCR Stats 1 2018 December — Question 1

Exam BoardOCR
ModuleStats 1 (Statistics 1)
Year2018
SessionDecember
TopicArea Under & Between Curves

1
\includegraphics[max width=\textwidth, alt={}, center]{166bcf11-c812-4077-91c8-916b093cbbd0-04_515_732_447_664} The diagram shows the curve \(y = \sqrt { x } - 3\). The shaded region is bounded by the curve and the two axes. Find the exact area of the shaded region.
\(2 \mathrm { f } ( x )\) is a cubic polynomial in which the coefficient of \(x ^ { 3 }\) is 1 . The equation \(\mathrm { f } ( x ) = 0\) has exactly two roots.
  1. Sketch a possible graph of \(y = \mathrm { f } ( x )\). It is now given that the two roots are \(x = 2\) and \(x = 3\).
  2. Find, in expanded form, the two possible polynomials \(\mathrm { f } ( x )\).