What's the answer to this calculus problem?

there's a attached picture... thanks

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  • 4 weeks ago

    THis is pretty much using the definition of partial derivative

    Let D/Dx = partial derivative wrt to x and so on

    Df/Dx = 8*x/(x^2 - y^2)      Df/Dy = -8y/(x^2 - y^2)

    D(Df/Dx)/Dy = 16xy/(x^2 - y^2)^2     D(Df/Dy)/Dx = 16xy/(x^2 - y^2)

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