|CAS 47-48 Find the maximum and minimum values of f subject to the given constraints. Use a computer algebra system to solve the system of equations that arises in using Lagrange multipliers. (If your CAS finds only one solution, you may need to use addi- tional commands.) 47. f(x, y, z) = ye²=; 9x² + 4y² + 36z² = 36, xy + yz = 1 48. f(x, y, z) = x + y + z; x? – y² = z, x² + z² = 4

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