

(50) 



vbi, yt hadeniis, efl; 



^ "fr b a b fin. ^ 



y (i — x^f ^ 



Pro fecunda ferie inuenienda multiplicetur forma illa : 

 (i — x^)~ fc" = I + 21 jc^ -i- ?S Jf' ^ -I- (£ a:' ^ -f- etc. 

 per formulam — ^ 1- , et fingulis terminis integratis 



)/(i — xV 



deducemur ad fequentem formam: 



/Lf!I^ — l^jLzz:BA-+-2lCA-f-?BDA-f-£EA + S)FA-f-etc. 



/(i — a:V+« 

 quae eft fecunda feries propofita in A duda, idcoque A S'''', 

 vnde concludimus fore 



^ /(i—jfi')»^-^ 



Ex his iam fiitis perfpicitur, quomodo omnium fe- 

 quentium ferierum propofitarum fummae afllgnari qucant : re- 

 peritur enim vt fcquitur: 





]/(l — atV^" 

 cv_ ^ f x-^^^- ^dx . 



^ /(l—.V^-H» 



etc. hinc 



