Kadencehm28231 Kadencehm28231 10-01-2024 Mathematics contestada Find the absolute maximum value of the function f(x, y) = 4xy - x - 3y over the closed triangular region D having vertices: a) D₁ and D₂ b) D₂ and D₃ c) D₃ and D₄ d) D₄ and D₁