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Math Help - Total differential

  1. #1
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    Total differential

    Imageshack - 32201349.png

    Help, please .

    I have the answer which is :
    dz = (2xe
    –xy – x2ye–xy)dx – x3e–xydy = xe–xy((2 – xy)dx – x2dy). Can you show me what step exactly do we take in order to get there. Thx
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    Quote Originally Posted by Tron View Post
    Imageshack - 32201349.png

    Help, please .

    I have the answer which is :
    dz = (2xe
    –xy – x2ye–xy)dx – x3e–xydy = xe–xy((2 – xy)dx – x2dy). Can you show me what step exactly do we take in order to get there. Thx
    \displaystyle z = f(x,y)

    Thus
    dz = f_x(x, y) dx + f_y(x, y) dy

    So what are the partial derivatives?

    -Dan
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