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Assume $y=\sum a_n x^n$. The ODE is $$y'' + (2 - 4x^2)y = 0$$

$y(0) = 1, y'(0) = 0$

$a_0 = 1, a_1 = 0, a_2 = -1$

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    What have you done?2012-11-08

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