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Math Help - Leibniz notation.

  1. #1
    Member integral's Avatar
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    Leibniz notation.

    How do you use this notation?

    If I have
    f(x)=x^3+5x^2+4

    How do you wright this?
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  2. #2
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    How do you write in Leibniz?

    \frac{dy}{dx} that means you have to take the derivative though.
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  3. #3
    Member integral's Avatar
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    Yes, but how do I use it in terms of the equation?

    \frac{dy}{dx}x^3+5x^2+4

    and if I have the notation:

    \frac{d}{dx} Or \frac{d}{dy} what does this mean?



    ?
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  4. #4
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    Since f(x)=x^3+5x^2+4, just make y = f(x) so y = x^3+5x^2+4.

    dy/dx = f'(x).

    dy/dx means derivative of y with respect to x.

    d/dx is the derivative with respect to x. If you have \frac{d}{dx}x^3+5x^2+4 then you just take the derivative of that.

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  5. #5
    Grand Panjandrum
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    Quote Originally Posted by integral View Post
    How do you use this notation?

    If I have
    f(x)=x^3+5x^2+4

    How do you wright this?
    \frac{df}{dx}=\frac{d}{dx}(x^3+5x^2+4)=\frac{d}{dx  }(x^3)+\frac{d}{dx}(5x^2)+\frac{d}{dx}(4)

    etc

    CB
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