CVIVSDAM INTEGRALIS. 37 



f. 10. Hic ftatim patet, perinde efle, quinam 

 numerus pro X accipiatur f, fit igicur X — 1, et. ha- 



bebitur ifta integratio 



/ d Z 7 Z <!T TT 



cx qua (equentia integralia fimpliciora' 



r d zl z j. r d z 1 z 



J 1 — z ' 1 -+-.Z. 



deriuare Iicet , ope huius* ratiocinii ;, ftatuatur 



/ z d z 1 z p 

 i — z z '' 



et pofrto . z. z — v „ vt. fit zdz,— i2\ et. Izzzllw 

 prodibit 



1. r dvlv- p- 



tj 7-pu. — r »• 



fi fcilicet: poft integratibnem fiat wzz v quippe quo- 



calu etiam fffc z — 1 ;, fic igitur erit: 



/d v l v A . O' 



nunc: prior illa- formula; addatur ad inuentamleritque , 



/dzlz-i-rdzl z, . p Ttjt- 

 T^z~z~. — " 1» 



haec au f emi formula- fponte ceduciturr ad! hanc: 



/ d Z l g p 7T7F 

 1 Z . " ' 8 , 



modo autem vidimus effe: 



/r=S fi^-7f?ri=^ 'ita, vr fit: 4.F=:P-^„ 

 Tnde. manifcfto; fk P — -15-",, ex; quo- fequitur. fore; 



fimili modo erit 



rd_Z±Z—_zd Zlz- p,__ tttt Ww ,- 



E & qme y 



