188 



(73) 



1 f r2 



-l> s- > ^ > • • • 



1, Z, 7}, ... 



D 



p,m-r\ 



~ ~2 ~TO + 1 



{m- 1) ! , D""-^— , jD™-^— , D"'-^ ^ 



S .s 



D" 



„7tt+l 



J)m+l^ jr)m+lil 2)'"+'-^ 





^2 



. D^ 



= 0, 



say Ço+Çi:+9,rH...+a,-ir-^+A4r+p.^+...+p,„,,-^-o. 



Now 



Vc;^^ 



a 



p. 



i+1 



Hid thence, // heing even, 



PiP"' + P^k^"''-+... + P. 



Pto+1 



?rt+l 



— N' 

 sniin = ( — 1)'" z- -iTfT-, 



(74) ; cn?w = (1-;?)" 2 





dn nu =(1-F^r" ^, 



