A curve has equation
y4e2x+2y−32x=k y^4 e^{2x} + 2y - 32x = k y4e2x+2y−32x=kwhere k k\,k is a constant. The curve has a stationary point on the yyy-axis. Determine the value of kkk.
47 exam-style questions on Edexcel A Level Maths 9.8 Implicit Differentiation. Each one has a worked solution and a mark scheme showing where the marks go.