BIHANG TILL K, SV. VET. AKAD, HANDL- BAND 8, N:0 20, 



SO erhalt man: 



r 



{y. - nxf + ^ V'.. (^0 - nccf' +^% il/o - «^)'*-' + 



j2 T2 v^o — / ■ |3 



t- 



» / \n — p . t » 



+ \];% C% — »'^)" +••..+ i^^^Ti v^„_i G/o — »^0 + 





Also ist: 



r 



V'3 =1 ^*V.-| « («-2) /./, + 2 («-l) (n-2) /-; 



2 



3 (»-l) («-2) (n-3)/l 





v'" - fe -'"' /. -ff "'"' (" - (^ - 1)) /^-^ /. 



+ w «'"' (" -^'~ ^)) (»-(''- 2)) /.-. fi 



+ (- 1/ ^ n-^'''\n - {r - 1)). . . .(n-(.-^O) /._,/: + 



4 



r— 2 



+ (-ir'' u^ « (»-(»•- D) ("-2)/, /;-% 



