Revision as of 12:46, 10 November 2012 by Goodwine(talk | contribs)(Created page with "The equation should be <math>\ddot x(t) = \sum_{n+2}^\infty n(n-1)a_n t^{n-2} = \sum_{n=0}^\infty (n+2)(n+1)a_{n+2}t^n </math> [[Engineering Differential Equations: Theory and ...")
