317 
tp, tp at—le, 
oe =e ee ete 
By means of (12) and (13) the equation (11) finally passes into 
the required identity (7). 8 
The above argument may further be used to prove the same 
identity for h <g<h+1, if it has already been established for 
g<h, h being a positive integral number. The general validity has 
therefore been proved. 
21* 
