Solving 3xy" - 4y' - xy = 0 with Frobenius

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I'm really getting stuck at this and I'm trying to read on it but it's confusing.

I need just a start-up for this equation which is to be solved with the method of frobenius.

3xy" - 4y' - xy = 0

Just need a start.

Any help is appreciated.

Thank you
 
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Start by substituting a power series in x for y. y=sum(a_k*x^k). Do the derivatives and equate coefficients of equal powers. Go!
 
done, then
 
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