# Math Help - Recursion relations

1. ## Recursion relations

prove that :
$\frac{d}{dx}[x^{-p} J \scriptscriptstyle p+1 \displaystyle (x) ] = \frac{2p}{x} J \scriptscriptstyle p \displaystyle (x)$

2. Again I refer you to Chapter 11 of Mathematical methods for physicists by Arfken to do so directly from the generating function.