Question: Consider the function f(x, y) = x^2 + 2y^2 ? 6x + 4y + 18 (a) Sketch the graph of level curves of f(x, y)

Consider the function f(x, y) = x^2 + 2y^2 ? 6x + 4y + 18 (a) Sketch the graph of level curves of f(x, y) on the domain ?10 ? x ? 10, ?10 ? y ? 10. (b) Calculate the gradient ?f

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