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calculus

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Just doing example questions to better understand. Find all first and second partial derivatives for the function
u= xy^2+x^2y

  • calculus -

    du/dx = y^2 + 2xy
    d^2u/dx^2 = 2y

    du/dy = 2xy + x^2
    d^2u/dy^2 = 2x

  • calculus - PS -

    Let's not forget

    d^2u/dx/dy = d^2u/dydx = 2

  • calculus -

    This is just for study for exam coming up and says it could be worth up to 12 marks. Not understanding vry well the two

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