Differential equation 2nd order

  • Thread starter gomes.
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  • #1
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i managed to get the indicial equation/recurrence relation, but for parts (a) and (b), im stuck. i got a0,a1,a2,a3... for part b, but how do i get the polynomial solution?

Thanks!
 

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Answers and Replies

  • #2
CompuChip
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For a), what happens when n = m?

For b), you have found a complete set of an. Where can you plug these in to get a solution?
 
  • #3
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thanks, for (a), when n=m, the recurrence relation becomes 0? what would i do next? sorry im still stuck

(b)sorry, i think my lecture notes missed out on this, what series/formula do i plug it into?

most appreciated.
 
  • #4
HallsofIvy
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You have your solution written as
[tex]\sum_{m= 0}^\infty a_mx^{m+r}[/tex]
That is what you plug your "[itex]a_m[/itex]" into. Notice that each a is a multiple of the one before it so if [itex]a_n= 0[/itex] for any n, all successive coefficients are 0 and your infinite sum becomes a polynomial as the problem says.
 
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