- #1
hotcommodity
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Homework Statement
[tex] \frac{d^2\phi(\eta)}{d\eta^2} = (\eta^2 - K) \phi(\eta) [/tex]
Where K is essentially a constant, K = 2n + 1 (n is an integer).
The Attempt at a Solution
I don't even know where to begin since [tex]\phi[/tex] is a function of [tex]\eta[/tex]. A push in the right direction would be much appreciated.