Find the absolute extrema of the function over the region R. (In each case, R contains the boundaries.) Use a computer algebra system to confirm your resulis. f(x,y)=8−3x−2y R : The triangular region in the xy-plane with vertices (2,0),(0,1), and (1,2) absolute maximum (x,y,z)=1 absolute minimum (x,y,z)=1