Find the points on the cone z = x + y that are closest to the point (-3,-1,0). Please show your answers to at least 4 decimal places. (-1.5,-0.52.5) X Suppose that f(x, y) = 2xy + 3x +9y then find the discriminant of f. 108 X -3x-4y+5x+7y Suppose that f(x, y) = = e then find the discriminant of f. Suppose that f(x, y) = x + y at which 0 x, y and 5x +9y 8. Please enter exact answers. 1. Absolute minimum of f(x, y) is 0.603 2. Absolute maximum of f(x, y) is DNE X not a valid fraction. X Find the absolute maximum and minimum of f(x, y) = 2x + 4y within the domain x + y 9. Please show your answers to at least 4 decimal places. Enter "DNE" if no answer exists. 1. Absolute minimum of f(x, y) is DNE 2. Absolute maximum of f(x, y) is DNE X X