Find the extreme values of f(x,y,z) = x² + 2y² + 3z² subject to the constraint x-y-z = 1. 6 O A. There is no maximum. The minimum is 11 OB. The maximum is O c. The maximum is 6 11 6 11 at at 6 11' 3 2 11'11 6 3 2 11' 11' 11 6 3 2 at (17--7-7-7) 11 11' 11 There is no minimum. There is no minimum.

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