Question: Find the minimum value of the function f(x. y, z) = x2 + 2xy + 3y2 + 2yz + z2 - 2x + 3 z

Find the minimum value of the function f(x. y, z) = x2 + 2xy + 3y2 + 2yz + z2 - 2x + 3 z + 2. How do you know that your answer is really the global minimum?

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