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In: Economics

Consider ​z = x ​ 1 ​ 2 ​ - 3x ​ 1 ​ x ​...

Consider ​z = x ​ 1 ​ 2 ​ - 3x ​ 1 ​ x ​ 2 ​ + 3x ​ 2 ​ 2 ​ + 4x ​ 2 ​ x ​ 3 ​ + 6x ​ 3 ​ 2 ​ .

1)Find the extreme values, if any, of the above function.

2)Check whether they are maxima or minima.

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