Finding Bessel Solutions for a Differential Equation with a Transformed Format

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Homework Statement


u''-bc (x^m) u =0

Homework Equations


How can I write the general solution in terms of Bessel function?

The Attempt at a Solution



This form is a transformed vresion of y'+by^2=cx^m with dummy variable by=1/u *du/dx
 
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ramtin said:

Homework Statement


u''-bc (x^m) u =0


Homework Equations


How can I write the general solution in terms of Bessel function?


The Attempt at a Solution



This form is a transformed vresion of y'+by=cx^m with dummy variable by=1/u *du/dx

I'm curious why you would go to the trouble of transforming your original DE when you can solve it directly. It's just a constant coefficient DE with a non-homogeneous polynomial term.
 
LCKurtz said:
I'm curious why you would go to the trouble of transforming your original DE when you can solve it directly. It's just a constant coefficient DE with a non-homogeneous polynomial term.

it was y'+by^2=cx^m ,Iforgot to type the y squared power
 
Here is what Maple gives, for what it's worth:

bessel.jpg
 
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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