a.A curve has equation; y=96x^2 -x^3, x>0
use differentiation to show that the coordinates of the stationary point are (64, 131072). show further that the stationary point is a maximum point.
b. when a particular makes of a car is driven at a speed of v km/h, where 50<=v<=100, the distance travelled, per litre of fuel, by the car is modeled by;
96v^2 -v^3 +200000/25000 kilometers. for the speed in the range 50km/h to 100 km/h , find the maximum possible speed of kilometers per litre that the car can achieve?
plss hlp me!!!