Differential Equation homework help

[Mivg]

Homework Statement

f(x) = \sum \frac{9^{n}}{4n} x^{2n}

n=1, \infty is on top of the summation sign.

Homework Equations

a) Use the Ratio Test to find the radius of convergence of the Power Series
b) Find f \grave{}(x) and write out the first three (non-zero) terms of the power series for f \grave{}(x)

 

[quantumdude]

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

3. Attempt at a solution.

Come on, this is an easy Calc II problem. A Diff Eq student should at least be able to start it.

 

[Mivg]

I got part a no problem, but having trouble with part b.

 

[Hootenanny]

I got part a no problem, but having trouble with part b.

There's still no attempt at a solution...

 

[Mivg]

Some help you guys are, thanks a bunch.

 

[quantumdude]

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:

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Color[/color] added for emphasis.

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