-^/:t ) 97 ( ^'p?- 



ciilus crgo rumma exprimitiir formuln: 



. X — A 



pofito .V zr o, ob X ~ A fic 



quac quidein, 



X — A . 



oi \erum quouis c\l'\i 



determiuato valorcm huius fr-icl^ionis fiue (eriei modo tr;i- 

 ditae lummam tacili negotio dtfiuirc litcbit. 



His in gcnere pracnotdtis fcquentium duarum fe- 

 rierum nlias liaiid facilis indaginis, miiii ab lliuftri quodiim 

 Geonietra quondam propofitarum fummationcm aggredior: 



II. 2 fui. Cp cof 2 Cp+ : fin.(|)^ fin.3 $) - 1 . 2' fin. C|)'cof ^Cj) 

 - ^ 2' fin.Cp^ fin. 5 4^ + ,-. 2' fnvCp^cof. 6 Cp-hetc. 

 Vtriusque lex progreifionis ex fequentibus clarius apparcbit. 



I. Summatio fcrici 



Pro fummanda hac ferie ponntur terminus gcnerah's 

 X — /(i-l-x), eritque feries fundamcntaiis 



l i -\-l z H-/3_^/44-/5_^/6-l- etc. 

 ita vt fint 



Tcrm. 

 feriei. 



l' 



A- / 1 

 B= /2 



C = /3 

 Dr:/4 



K :r / 5 

 Y -1 6 



G:3/7 



n 





iir 



Differcntiae. 



^ :-^' ^ 

 /4' 



:6 



l '■ Hl tlL? I '• ' •' 



/ w 



4- 



v 



)S. 



VI' 



/ 1. 1". 5'^ 



Aaa Acad. hr.p. Sc. Tom. 11 P. 7/. 



N 



£z 



