Radius of convergence quick help

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Homework Help Overview

The discussion revolves around determining the lower bound of the radius of convergence for series solutions of a differential equation given by (2+x^2)y''-xy'+4y=0, centered at x0=0.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the initial steps needed to approach the problem, with some questioning the relevance of discontinuities in the function P(x). Others suggest using Fuchs' Theorem as a potential method for analysis.

Discussion Status

There is an ongoing exploration of the problem, with participants providing hints and encouraging the original poster to engage more deeply with the process. Some have expressed confidence in their understanding after further consideration.

Contextual Notes

Participants note the lack of explicit starting points from the original poster and the potential need for additional information to clarify the problem setup.

SoulofLoneWlf
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quick help on this i seem to be missing some logic or process
determine the lower bound the radius of convergence of series solutions about the given X0

(2+x^2)y''-xy'+4y=0

xo=0
 
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Well, we can't really help you unless you start the process. Do you have any idea where to go from here?

EDIT: If you've got absolutely no idea where to start, you should just Google "radius of convergence series solutions."
 
nickmai123 said:
Well, we can't really help you unless you start the process. Do you have any idea where to go from here?

EDIT: If you've got absolutely no idea where to start, you should just Google "radius of convergence series solutions."

well i was seeing that (2+x^2) has no discontinuity
so shouldn't the radius be infinity?
 
What does discontinuities of P(x) have to do with anything? A hint would be writing the DE in the form y^{''}+P(x)y^{'}+Q(x)y=0 and using a Fuchs' Theorem.
 
nickmai123 said:
What does discontinuities of P(x) have to do with anything? A hint would be writing the DE in the form y^{''}+P(x)y^{'}+Q(x)y=0 and using a Fuchs' Theorem.

thanks guys just hammered through it think i got my head around it :)
 

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