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Differential Equation homework help

  1. Jul 10, 2008 #1
    1. The problem statement, all variables and given/known data

    f(x) = [tex]\sum[/tex] [tex]\frac{9^{n}}{4n}[/tex] x[tex]^{2n}[/tex]

    n=1, [tex]\infty[/tex] is on top of the summation sign.


    2. Relevant equations

    a) Use the Ratio Test to find the radius of convergence of the Power Series
    b) Find f [tex]\grave{}[/tex](x) and write out the first three (non-zero) terms of the power series for f [tex]\grave{}[/tex](x)
     
  2. jcsd
  3. Jul 10, 2008 #2

    Tom Mattson

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    You've, erm, omitted a section of the posting template, haven't you?

    Come on, this is an easy Calc II problem. A Diff Eq student should at least be able to start it.
     
  4. Jul 10, 2008 #3
    I got part a no problem, but having trouble with part b.
     
  5. Jul 10, 2008 #4

    Hootenanny

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    There's still no attempt at a solution...
     
  6. Jul 10, 2008 #5
    Some help you guys are, thanks a bunch.
     
  7. Jul 11, 2008 #6

    Tom Mattson

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    Sorry, apparently you've found the wrong website. You meant to post on http://www.wedoyourhomeworkforyou.com.

    But if you want to continue to post here, you must abide by the rules that you explicitly agreed to before registering.

    To refresh your memory:

    Color added for emphasis.

    And hey, don't get mad at me. I don't write the rules here. Oh wait, yes I do...
     
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