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Second order homog. DE non-const coeff.

  • Thread starter EvLer
  • Start date
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I have a 2nd order homogeneous non-const. coefficients linear DE, and don't remember how we used to solve it or even if we did at all, looked through the book, but it only covers a case of Cauchy-Euler.

The original question actually goes like this:
verify that y(x) = sin (x2) is in the kernel of L,
L = D2 - x-1D + 4x2, where D is a differetiation operator.

so what I have so far is this:
Ly = 0
when I distribute I get this DE and get stuck with it:

y'' - x-1y' + 4x2y = 0

Thanks for any help.
 

ehild

Homework Helper
15,345
1,753
EvLer said:
The original question actually goes like this:
verify that y(x) = sin (x2) is in the kernel of L,
L = D2 - x-1D + 4x2, where D is a differetiation operator.

so what I have so far is this:
Ly = 0
when I distribute I get this DE and get stuck with it:

y'' - x-1y' + 4x2y = 0

Thanks for any help.
This is a very simple question, just insert sin(x^2) for y.

ehild
 
458
0
shoot...i need sleep. :yuck:

Thanks :smile:
 

ehild

Homework Helper
15,345
1,753
EvLer said:
shoot...i need sleep. :yuck:

Thanks :smile:
Good night, sleep tight! :zzz:

ehild
 

GCT

Science Advisor
Homework Helper
1,727
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sleep...highly recommended
 

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