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    Hey,

    I can see in example 2 (attached) how they have got to d / dx = (x + 1) - x / (x + 1)² but then how did they know the top line was equal to 1.

    Any help would be greatly appreciated as I seem to be having a mental block with differientation unfortunately........

    Thanks
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    :eek: :eek: :eek:

    Look at it carefully

    (x+1)-x
    x+1-x
    x-x+1
    =1

    thats quite a low, you were must have been seriously overcomplicating this.
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    Ummm, x + 1 - x = 1

    Add an x, take away an x, and add 1.
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    (Original post by Malik)
    :eek: :eek: :eek:

    Look at it carefully

    (x+1)-x
    x+1-x
    x-x+1
    =1

    thats quite a low, you were must have been seriously overcomplicating this.
    Yeah but I was worried about:

    (x+1)-x
    = -x² - x

    Thanks guys
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    What are you on about?

    If you don't understand simple stuff, then quit.
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    (Original post by supreme)
    Yeah but I was worried about:

    (x+1)-x
    = -x² - x
    For future reference if it was -x then it would be written like

    -x(x+1) or (-x)(x+1) or (x+1)(-x)
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    (Original post by Malik)
    For future reference if it was -x then it would be written like

    -x(x+1) or (-x)(x+1) or (x+1)(-x)
    Thanks I can't believe I made that mistake.
 
 
 
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