Revision as of 16:43, 10 November 2012 by Goodwine(talk | contribs)(Created page with "The equation should be <math>\frac{d^2 y}{d x^2} = \sum_{n=2}^\infty n (n-1) a_n x^{n-2} = \sum_{n=0}^\infty (n+2)(n+1)a_{n+2}x^n</math> [[Engineering Differential Equations: T...")
