#9, Again, f(x,y) = x² + y² = xy-3x Find the absolute minimum and absolute maximum of fon the region R bounded y=3-x, x = 0, y=0. ,x=0, by

Find the absolute minimum and absolute maximum of f(x,y)=19−9x+13y on the closed triangular region with vertices (0,0),(13,0) and (13,15). Minimum value: Occurs at: Maximum value: Occurs at:

find absolute maximum and minimum of f(x,y)=x^3+3xy-3y^2+2 in a region whose vertices at (-1,-1) (-1,1) (1,1) (1,-1)

Find the critical point of ƒ(x, y) = xy + 2x - ln x2y in the open first quadrant (x >0, y>0) and show that ƒ takes on a minimum there.