Решебник Арутюнова Ю.С. Задание N251 Высшая математика

Ready solution of the problem. The sorcerer of Arutyunov. Task number 251.

251 - 260. Find the smallest and largest values of the function z = f (x, y) in the closed domain D defined by the system of inequalities. Draw a drawing.

251. z = x2 + y2 - 9xy + 27; 0 ≤ x ≤ 3, 0 ≤ y ≤ 3.

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Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)