Find the set of points in the plane where each function is discontinuous. Be sure you can explicitly write out what these points are! Then choose the shape of the set of points where the function is discontinuous. a. f(x, y) 60 + 3y 9x - 4y The set of points at which f(x, y) is discontinuous is ?
b. f(x, y) бу 22 + 3 The set of points at which f(x, y) is discontinuous is ?
c. g(x, y) = 6x2 + 3y2 22 17:+ 72 The set of points at which g(x, y) is discontinuous is ?
d. g(x, y) 6 3x +9y2 The set of points at which g(x, y) is discontinuous is ?