Question: Let w = (x, y, z) be a function of three independent variables and write the formal definition of the partial derivative /y at (x

Let w = ƒ(x, y, z) be a function of three independent variables and write the formal definition of the partial derivative ∂ƒ/∂y at (x₀, y₀, z₀). Use this definition to find ∂ƒ/∂y at (-1, 0, 3) for ƒ(x, y, z) = -2xy² + yz².

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