Question: The function f(x,y) = 8x + 7y has an absolute maximum value and an absolute minimum value subject to the constraint x + y

The function f(x,y) = 8x + 7y has an absolute maximum value

The function f(x,y) = 8x + 7y has an absolute maximum value and an absolute minimum value subject to the constraint x + y = 4. Use Lagrange multipliers to find these values. The absolute maximum value is (Type an exact answer.).

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