Question: Find the minimum and maximum values of the quadratic form 2x 2 + xy + 2xz + 2y 2 + 2z 2 where x, y,

Find the minimum and maximum values of the quadratic form 2x2 + xy + 2xz + 2y2 + 2z2 where x, y, z are required to satisfy x2 + y2 + z2 = 1.

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