"4^.1 ) ^93 ( 



IV. ik [k -{- V V ~ i — Cm. i* cof. r* 



V. p, cof. ^ — K fm. ^ — — cof. i cof. r 

 vnde fiet 



jx</X — V//Y11: — ^jc cof. i -{- d z fin. i fin.V 

 \ — ( I -f- .v) </ ^ fin. i' fin. r cof. r 



+j{^^9>i^ -fin. 1'cof r')+</rcof i) ^ 



— s // ^ fin. { cof i cof r 



et fubftitutis his valoribus aequawo noftra fiet : 

 '** " </ <^ Y H- ^ .V ^ r -H ^ jc </ ^ cof i — </ 2 ^ ^ fin. t fin. r 



— z dr d^ fin. i cof. r, — — vi^X — |ji.</</Y 

 ~\r d d Z fin. i cof r—id X d r +y d r* 



\' +y d ^ d, r cof. i -- s; <;/ 1^ ^ r fin. i cof r , . 



— d X d ^ cof \-^ d z d^ fin. i fin. r 



— ( I + .V ) t/ ^' fin. i' fin. r cof r\y d^ 

 -y d^'{\n.C co{.r^-\-ydrd^zo{.v 



— z d^ fin. i cof i qof r. 



Qnod fi iam loco d dX^ d dY , d d Z valores dati fubfti- , 



tuantur et reliqui mcmbri a dextra ad finiftram transferan- 

 tur, prodibit ifta aeqnatio : 



ddy+2.dxdr -^d^^^rf/^fm.ifin.r-l-^i+jf^i/^^fin.t^^fin.rcof r--j//r* 

 +2^jr^^Gof. ^ydg; 



-zyd^drcof.i 

 ■\-yd^'iin.i'coi:.r' 

 + 2; dQ' fin. I cof i cof r 

 ~ — dt^ {vL-\- ij.M — N fin. icof r). 



t 

 §. 12. Tertia denique aequatio differentianda, ex 

 §. 8. fumta eft: 



</ 5; — ( I +jr) </^ fin. icof r+jK ^^ fin. ifin. r 

 =zdX fin. » fin. ^ - ^ Y fin. i cof ^ + ^ 2 cof i 



O o 3 Tudc 



