Edexcel P4 2023 January — Question 5

Exam BoardEdexcel
ModuleP4 (Pure Mathematics 4)
Year2023
SessionJanuary
TopicImplicit equations and differentiation

5. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{c46ca445-cf59-4664-931e-add9f2f81851-14_940_881_251_593} \captionsetup{labelformat=empty} \caption{Figure 2}
\end{figure} Figure 2 shows a sketch of the curve with equation $$y ^ { 2 } = 2 x ^ { 2 } + 15 x + 10 y$$
  1. Find \(\frac { \mathrm { d } y } { \mathrm {~d} x }\) in terms of \(x\) and \(y\). The curve is not defined for values of \(x\) in the interval ( \(p , q\) ), as shown in Figure 2.
  2. Using your answer to part (a) or otherwise, find the value of \(p\) and the value of \(q\).
    (Solutions relying entirely on calculator technology are not acceptable.)