﻿Higher Derivative of a Function. 831 



Therefore 



%?:i:<-<)r?)r?-vs>] 



ffi n *L * --. Let x z -x 7 =u and (l-w)- p = y, 



=n! ^, ( " 1) V /3 A » r 



Ncr 



Therefore 

 4 



xT(-i)'( r ii( 3K "^^)^- fcH ^ c, ( i>+ «~ 1 ) (1 " 4 ' + " r 



«'• I's^Ys (-ir +? i r,c J a> ) 



/ 3K -3. + 4/3\ / P + K -1\(., 3 -^).^1 3 ^ 

 M » A K ) (l-^+« r )* 



/3/c- 3«- 4j8\ /» + « - 1 \ (1 - ^)V" +4;S 



University of Pennsylvania, 

 Philadelphia, Pa., "U.S.A. 



