Chapter 12.13, Problem 1P

Using equations (12.9) and (13.1), write out the first few terms of $J_0(x),J_1(x)$ $J_{-1}(x),J_2(x),J_{-2}(x).$ Show that $J_{-1}(x)=-J_1(x)$ and $J_{-2}(x)=J_2(x)$.