The displacement, sss millimetres, of a robotic arm at time ttt seconds is given by the equation
s=(0.35t−4.2)e0.4t s = (0.35t - 4.2) e^{0.4t} s=(0.35t−4.2)e0.4tDetermine, using calculus, the exact value of ttt for which the displacement has a stationary point.
109 exam-style questions on CCEA A Level Maths 3.5.2 Differentiation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.