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Math Help - Derivative by first principles

  1. #1
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    Derivative by first principles

    Derivative by first principles-first-prnciple.png
    I know how to do the question, I am just having trouble with the algebra someone please help
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  2. #2
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    Re: Derivative by first principles

    Please show us what you have done, then we can guide you wherever you made a mistake or are stuck.
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  3. #3
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    Re: Derivative by first principles

    I can't quite read the numerator of your function. They mean for you to plug in to the definition of derivative: f'(x)=\lim_{h\to{0}}\frac{f(x+h)-f(x)}{h}.

    So what happens when you plug in your function?

    - Hollywood
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  4. #4
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    Re: Derivative by first principles

    It's ok I got it, someone helped me out
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