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Math Help - [SOLVED] Partial Derivatives

  1. #1
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    Jul 2009
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    149

    [SOLVED] Partial Derivatives

    If i have

     f(x,y) = x^3+4x^2y+4y^3

    Then are these answers correct?


     f_x = 3x^2+8xy
     f_y = 4x^2+12y^2
     f_{xx}=6x+8y
    f_{yy}=24y
    f_{xy}=8
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  2. #2
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    Lesotho
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    all are correct except fxy
    fxy=8x
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