MacLaurin Series solution to initial value problem

tracedinair
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Homework Statement



Find the first six nonvanishing terms in the Maclaurin series solution of the initial value problem (x^2 - 3)y''(x) + 2xy'(x) = 0 where y(0) = y0 and y'(0) = y1.

Homework Equations





The Attempt at a Solution



Should with just something like Φ(x) such that Φ(x) = \sum from 0 to infinity of Φn(x) / n! * xn?

Or should I use the undetermined coefficient solution of the form \sum from k=0 to infinity of akxk?
 
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I would go with the latter.
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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