Use Lagrange multipliers to find the maximum and minimum values of f subject to the given constraint. Also, fihd the points at whi these extreme values occur. f(x, y) = xy; 75x² + 3y2 = 2400 Enter your answers for the points in order of increasing x-value.. Maximum: 80 at ( 4. 20 ) and ( -4 -20 Minimum: -80 at ( 4. -20 ) and ( -4 i 20 ENG US

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