hello
16 Partial differentiation.
c16a.zip : Plot the functions f(x,y).
c16f.zip : Partial derivatives.
c16g.zip : Newton's method for the system of two equations in two unknowns.
c16h.zip : Implicit differentiation.
c16i.zip : The gradient. The directionnal derivative.
c16j.zip : The gradient. The directionnal derivative. (II)
c16k.zip : Tangent plane, Normal line, level curve.
c16l.zip : Local maximum, minimum, saddle point.
c16m.zip : Local maximum, minimum, saddle point (II).
thank