JenniferSmart1 Group Title $(x-1)y''+y'=0$ $y=\sum_{n=0}^{\infty} a_n x^n$ $y'=\sum_{n=1}^{\infty} a_n x^{n-1}$ $y''=\sum_{n=2}^{\infty} n(n-1)a_n x^{n-2}$ one year ago one year ago
$xy''-y''+y'=0$ $x\sum_{n=2}^{\infty}n(n-1)a_nx^{n-2}-\sum_{n=2}^{\infty}n(n-1)a_nx^{n-2}+\sum_{n=1}^{\infty} a_n x^{n-1}=0$