Question: Obtain from first principles the partial derivatives f/x and f/y of the function f(x, y) at the point (1, 2), where f(x, y) = 2x

Obtain from first principles the partial derivatives ∂f/∂x and ∂f/∂y of the function f(x, y) at the point (1, 2), where f(x, y) = 2x2 – xy + y2

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