Use Lagrange multipliers to find the maximum and minimum values of f(x, y) = 4x − y subject to the constraint x² + 2y² = 66, if such values exist. maximum = minimum = (For either value, enter DNE if there is no such value.)

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Q: 5) (using Euler's Criterion (Assume g is a primitive root modulo p where p is an odd prime.)

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