For the function f(x,y) = 4xy - x^3 - 2y^2 find and label any
relative extrema or saddle points. Use the D test to classify. Give
your answers in (x,y,z) form. Use factions, not decimals.
The derivative of a function is f'(x)=-6x^2(x-1)(x+2). How can I
identify any local extrema of f, if any? How can use the First
Derivative test to determine if any of the local extreme identified
are a relative maximum or a relative minimum?