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    Hi guys, I really need some help with my calculus.
    Iv'e searched on the internet to help with my understanding but I can't get my head around it!

    The two questions I have are attached as a picture.

    I would love some help, thanks in advance!

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    follow the rule
    \frac{d(ax^{n})}{dx}=anx^{n-1}
    for example
    \frac{d(5x^{7})}{dx}=35x^{6}
    or
    \frac{d(5x^{\frac{7}{5}})}{dx}=7  x^{\frac{2}{5}}
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    (Original post by depymak)
    follow the rule
    \frac{d(ax^{n})}{dx}=anx^{n-1}
    for example
    \frac{d(5x^{7})}{dx}=35x^{6}
    or
    \frac{d(5x^{\frac{7}{5}})}{dx}=7  x^{\frac{2}{5}}
    Would you be able to give an example similar to one of those questions to help my understanding?
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     \displaystyle \frac{d(x^{-1/2})}{dx} = -\frac{1}{2} x^{-3/2} .
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    (Original post by depymak)
    follow the rule
    \frac{d(ax^{n})}{dx}=anx^{n-1}
    for example
    \frac{d(5x^{7})}{dx}=35x^{6}
    or
    \frac{d(5x^{\frac{7}{5}})}{dx}=7  x^{\frac{2}{5}}
    Last one, there's a slight mistake.
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    (Original post by B_9710)
    Last one, there's a slight mistake.
    Could you please explain?
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    (Original post by B_9710)
    Last one, there's a slight mistake.
    it looks OK to me :holmes:
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    (Original post by depymak)
    Could you please explain?
    It's ok, my mistake. For some reason I though the exponent was 7/2 rather than 7/5 so I'm my head I was wrong. Never mind.
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    (Original post by the bear)
    it looks OK to me :holmes:
    Yeah my mistake buddy.
    You know where you struggle with KS2 SATS subtraction for a minute or 2.
 
 
 
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