) 109 ( |*?|<* 

 Hiiicque integrando fit : i rriL ^ 



Pro priori autem membro ftatuatur ^ ''^ ^* " '' — i; , ex 

 quo fiet ' '''j ' =r -y* et ^' ";'''" — i — e?* , tum vero erit 

 (t _ j^ )d X — v' ii i; , hincaiie 



(. _;c=) v(.x= --0 ■ :: ,^^ liuum 



Vnde integratione fafta colligimus: 



/ 'i =- i/^+^/i^--Urc. tang.^-iL ('^3. 



(I - *') V(»x» - i) ■" ?R' ^v , ■■ i. 



S. X 



§. (J. Si in formula differentiali pfopofita 



. — loco X fcribatur —x, facile liquet formu- 



(, ^x)v(2x^- i> sbnT . f I -+- "t. i) V :r:; .- -fijjKrtt' < 



lam quoque ~ fimili ratione per Logarithmos 



(. - X) ^(Ja^ - 



et arcus circulares integrationcm admittere. Quin immo 



vti formula --— per huiusmodi quantitates fit 



(.-*')V (.*'-.) ,,? iiol. 

 integrabilis, ita quoque irtius fbrmulae ^^-^ per 



(. H- X») V(jx» - i) 



Logarithmos et arcus circulares integratio abfoJujtur, adhibita 



enim fubftitutione V(2jr' — i) r j', fit 2jf'-i+j% hiiic 



xdx—y'dy et i -h ^' ~ i (3 -i-j*), 

 Tnde coUigitur ~^ — i^Li?, quae rationalis fac- 



(> -f- x~-) V(jx= — >) 



ta eft ideoque per Logarithmos et arcus circulares inte- 

 gratur. Si pro hac formula vfus adhibeatur fubftitutionis 



tang. js 2= r (2 .r* — i) , fiet 



O 3 1 + 



