^l 



h 



J. 20. Cam igitur fit 

 9 $ cof. i i 



-rr a 



(I +aa— ::acof.(p/ -+-*""(! — aa)''''-^' 



TT a' /n -\- i\ 



~(i — aa^^^-^-^V i / ' 

 in hac forma loco n fcribamus — n — i , filquc 

 ^ ^(r)cof.i:l) fa 0ro 1 _ ^r g' ^^ ^^.^ 



(i-+-aa-2acor.Cp;-"Lad^=i8o"'J (i_aa)--'^-^ ' 



U :== (ziL-iil) (:^:^) ^ (:^l:ii^') (=^'> ci H- etc. 

 ideoque 



U — z('-=^) — ('- -;-^ )(i — aa)-^"-^ j. 



§. 2 1. Ponamus iam (iH-aa — sacof.Cj)) = ^, et 

 contemplcmur hos duos valores integrales, quos modo fumus 

 alTecuti : 



J A^-^i ~~(T — aa)^''-^^ i / ' 



II. /A"acJ:cof.i(l)zr 



TT a 





( I — a a)- 

 z=:7ra'"(ir^i)j, 



-confequenter inter has daas formulas integrales a termino 

 (p =z o ad terminum Cp— i8o° extenfas confequimur hanc 

 lelationem muxime memorabilem: 



iive eiit 



('L^J)(i-ao)-Yd"a(^cor.i-^r(-"--^-"')(i-ca)-'-'YA-"-'a4:cof.tCt?. 



I 2 J. 22. 



