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Math Help - Very simples question re: indices and differentiation

  1. #1
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    Very simples question re: indices and differentiation

    I struggle a bit with indices, and am trying to differentiate this - I won't post the whole question, just the little bit I am stuck with. I will actually use a different fraction as well, as I need to know how to do it myself! It is just the theory I am struggling with.

    x^9/2

    I differentiate this to 9/2x^7/2

    Is that correct?

    I feel I need to do some shuffling around of the result, to tidy it up a bit and make it easier to work with, but am getting mixed up with square roots and fractions etc.

    Advice much appreciated!

    Thanks.
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  2. #2
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    Re: Very simples question re: indices and differentiation

    Quote Originally Posted by SamanthaJane View Post
    I struggle a bit with indices, and am trying to differentiate this - I won't post the whole question, just the little bit I am stuck with. I will actually use a different fraction as well, as I need to know how to do it myself! It is just the theory I am struggling with.
    x^9/2
    I differentiate this to 9/2x^7/2
    Is that correct?
    It is always best to post the whole question,
    \frac{{d\left( {{x^{9/2}}} \right)}}{{dx}} = \left( {\frac{9}{2}{x^{7/2}}} \right)
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