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Math Help - I need help with maths please

  1. #1
    Newbie dooozer's Avatar
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    not allowed to say, ok i'll tell you NEW YORK xoxo
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    I need help with maths please

    Hi i have a problem, my exams are coming up in two months but i have no idea about maths, such questions as:
    Differentiate withrespect to x

    (i)
    3x8

    (the 8 is the small 8 that does be on the top right hand corner)

    (ii)
    1
    - (x2-4x)
    2

    to be honest i have no idea, can anyone help be please,
    thanks.
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  2. #2
    MHF Contributor
    Joined
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    West Malaysia
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    Quote Originally Posted by dooozer View Post
    Hi i have a problem, my exams are coming up in two months but i have no idea about maths, such questions as:
    Differentiate withrespect to x

    (i)
    3x8

    (the 8 is the small 8 that does be on the top right hand corner)

    (ii)
    1
    - (x2-4x)
    2

    to be honest i have no idea, can anyone help be please,
    thanks.

    (1) 3x^8

    \frac{dy}{dx}=8(3)x^{8-1}=24x^7

    (2) \frac{1}{2}(x^2-4x) , expand it first ..

    =\frac{1}{2}x^2-2x

     =\frac{1}{2}(2)x^{2-1}-2

     =x-2
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  3. #3
    Newbie dooozer's Avatar
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    not allowed to say, ok i'll tell you NEW YORK xoxo
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    7

    thanks

    thank you, very nice,
    could yu teach me some maths or is that t much to ask xxxxxxxxxxxxx
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  4. #4
    Flow Master
    mr fantastic's Avatar
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    Quote Originally Posted by dooozer View Post
    thank you, very nice,
    could yu teach me some maths or is that t much to ask xxxxxxxxxxxxx
    Read this thread: http://www.mathhelpforum.com/math-he...lp-please.html

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