568 Prof. I. J. Schwatt on the 



and letting S = \— 2 7 — /a, 



q (+1 „= s 'i\-bn-^- if - k l K ~i~ x ) 



j8=0\=0 \ P 7 



xiI<- i »"<-»-'-'rr 1 )( x -?;f-r 1 )" 



Since _„[*] £]-*_* 



2 2 A x ,,= 2 2 A A , y , 



A = y=0 y = A = 2y 



therefore 



cam-* 



Q*i..= 2 2 [-by+*(-4-»-i> 



8=0 y=0 



\ll { ~ a) i 7 A P A 7+*-l ) 



:2y M =0 



Now 



K--2)3X-2v 



2 2 , 



A = 2y M =0 



a 



{v+t-l\/K-/3-\\(\-y-fM + t-l\ 



*- 2 £- 2 >V ._„ / 7 +i-iY-^- 2 Y«-^-\v^-7-^+^-i\ 



= X Q (-a) ^ 7 j £ (.-.2/3-xX *-&-#i )' 



and since 



(?) -c-D-p-r 1 ), . j 



= (_l)«-cx coefficient of a«-s?-2y->« hi (1 + .r)-*-'-**- 1 

 -<■ i; \,«-2/3-27-^ / l_ V*-2/3-27- / ti / 1 ' 



Therefore 



LlJ LU — P r-2/3-2y 



Q (+1 ,„= 2 2 (-6)'+' 2 (-a)-"+«- 2 ^-^ 



/B=0 y=0 ju.=o 



/ 7 + <_l\/ lc _^_ 7 + ^_ /A \ 



X V 7 A £ + 7 + ' / 



