Answer :
It is given in the question that,
Z = x + y
We have to subject on the following equation:
(x, y) = (0, 1), (- 1, 0)
(x, y) = (0, 0), (1, 1)
From the above graph it is clear that, there is no common region or say feasible region. Hence, for the given condition Z has no maximum value
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