2024 VJC H1 Q3

2024 VJC H1 Q3

6 marks
  1. The curve \(C\) has equation \(y = \ln(k - 2x)\) where \(k\) is a negative constant. Sketch the graph of \(C\), stating, in terms of \(k\), the coordinates of any point(s) of intersection with the axes and the equation of any asymptote(s).[2]
  2. It is given now that \(k = -3\). The equation of the tangent to \(C\) at \(x = -\frac{5}{2}\) cuts the \(x\)-axis and the \(y\)-axis at point \(P\) and point \(Q\) respectively. Find the exact area of the triangle \(OPQ\).[4]
Answer:(b)Area of \(\triangle POQ\) =\(\frac{1}{2}(\frac{5}{2}-\ln 2)^2\) units\(^2\)

Need help? Join our JC Math tuition classes.

Learn more