Maths Help?

Discussion in 'General Off-Topic Chat' started by Hellow, Aug 28, 2011.

  1. Hellow
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    Hellow GBAtemp Regular

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    Hey guys so i need help with maths D;
    the question is f(x)=3x^2(1-2x)^5. Find f(1) and f '(1)
    It's annoying me soooo much :/
     
  2. mcp2

    mcp2 GBAtemp Advanced Fan

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    UK blud dun kno
    Product rule my man and chain rule for this bit '(1-2x)^5'
     
  3. Veho

    Veho The man who cried "Ni".

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    (f(x) * g(x))' = f'(x)*g(x) + f(x)*g'(x)
    (f(g(x)))' = f'(g(x))*g'(x)



    f(1) = 3*12*(1 - 2*1)5 = -3



    f'(x) = 6x(1 - 2x)5 + 3x*(1 - 2x)4*5*(-2)

    f'(1) = -36


    I think. [​IMG]