'.I ) "5 { r?i- 



dx -^oc^-^^dx 

 ef , — 



(i-jr'"jy(2Ar'"-i) (i-ft--"} y(fijK-'»-i) 

 y ( 2 .v"* - I ) 



pro prima ftatuatur c — — , vnde colligitur 



( I — r'" )* 





et diflferentialibus fumtis prodit 



hiscque 



et 



A-( I -jr'") 

 djc_ 



' ^ (i-jc'") y(2x'^-i) 



d X 

 ex quo patet tts per Logarithmos ct 



(i - Jf'") V(2 Jf™- i) 



arcus circiilares efle inteerabilem. Pro fecunda fnrma po- 



natur ^ =r y ( 2 jc"* - i ) , ficque fiet ^ ( i -j"") zz i - x"", 

 hinc fumtis difFerentialibus 



j'™"-' ^/zzjc'"-' </jr , vnde 



2 (l -J^™) — I — JK-'" 



ct 



