let f (z) = z2 + z find the maximum value of If(z)l A = {z € C:0 < x, y < 2} on the square

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Q: let f(z) = z2 + z find the maximum value of If(z)| on the square A = {z € C:0 < x,y < 2}

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Q: If x² + y² < z < 1, find the maximum and minimum of the function u(x, y, z) = x + y + z

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