Efl; autem 



— rrj", ideoqiie ^r"* — . , 



Tnde y fumtis logarithmis erit 



hincque differentianda- 



dx dy f^^dy iy 



Hoc valore fubftituto formula integralis propofita trans- 



mutatur i\\ hanc rationalem : / ~7~~n — r ^uae autemv 



ob terminos integrationis .v zr o et jf — i , ab j- :z= o 

 Tsque ad j' — 00 eft extendenda, ita vt nunc habeamus 



y ^i^^P"]"— 'i LadA-z:i_l I -4-y' L adj-cxaj 



%. 16. Integrationf acJluali fatis obrtrufae hic im-: : 

 morarr fuperfluum foret, cum III. Eulerus iam dudum iiu 

 Calculi Integralia Tom. 1. pag. 252. demonftraucrit eflfe 



yp--' d y r 2^\)y—o ^__^r 



/ j ^y'^ \ady — ooy— n fm. ^ ' 



Hoc cnim notato iutegrale quaefitum formulae propofitae: i 

 crit 



TT Tf TT . 



Per 



