In exercises 31-38, find the absolute maxima and minima of the func- tions on the given domains. 31. fx, y)= 2x- 4x + y- 4y + 1 on the closed triangular plate b

In Exercises 31-38, find the absolute maxima and minima of the func- tions on the given domains. 31. fx, y)= 2x- 4x + y- 4y + 1 on the closed triangular plate bounded by the lines x 0, y = 2, y = 2x in the first quadrant