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Homework Help: Doing a MacLaurin Series and more

  1. Feb 25, 2010 #1
    Doing a MacLaurin Series and more!!

    The function f is defined by f(x) = 1/(1+x^3). The MacLaurin series for f is given by
    1 - x^3 + x^6 - x^9 +...+ (-1)^n(x^3n) +...
    which converges to f(x) for -1 < x < 1.

    a) Find the first three nonzero terms and the general term for the MacLaurin series for f '(x).

    b) Use your results from part (a) to find the sum of the infinite series -3/2^2 + 6/2^5 - 9/2^8 +...+ (-1)^n[3n/ 2^(3n - 1)] +...

    c) Find the first four nonzero terms and the general term for the MacLaurin series representing the intergral from 0 to x of f(t) dt.

    d) Use the first three nonzero terns of the infinite series found in part (c) to approxiamate the integral from 0 to .5 of f(t) dt. What are the properties of the terms of the series representing the integral from 0 to .5 of f(t) dt that guarantee that this approxiamation is within 1/10,000 of the exact value of the integral.


    I don't even know what to do in this one! I need some major help! especially in part b and d!! DX

    Please and Thank You!! :)
     
  2. jcsd
  3. Feb 25, 2010 #2
    Re: Doing a MacLaurin Series and more!!

    Could you rewrite the formula in LaTex?
    It's terrible to read your 'formula'
     
  4. Feb 25, 2010 #3

    vela

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    Re: Doing a MacLaurin Series and more!!

    What did you get for parts a and c?
     
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