2025 NASS P2 Q9

2025 NASS P2 Q9

Secondary 4
11 marks

A curve has the equation \(y=\dfrac{e^{2x}(3x+2)}5\).

  1. Find the \(x\)-coordinate(s) of the stationary point of the curve.[5]
  2. Find \(\dfrac{\mathrm d^2y}{\mathrm dx^2}\) and hence determine the nature of the stationary point.[4]
  3. Explain why given that when \(x>-1\), the gradient of the curve is positive.[2]

Solution:

Solution locked

Sign in to view the step-by-step solution

Similar questions are unavailable for this question.
Answer:(a) \(x=-\dfrac76\); (b) \(\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{e^{2x}}5(12x+20)\), minimum; (c) both factors in the first derivative are positive.

Need help? Join our JC Math tuition classes.

Learn more