hincque 



d\lj — d^— — d^ COf. 71 fin. \L»* — dy>. cof.y) coj.^j, Un.^ 



Jln, Y] ' 



vbi, fi loco ^^7 valor ante inuentus fubftituatur, prodic 

 d\\/ — d(p — — d ^ cof. 7] , ideoque 

 </ (p — </ 4» + </ ^ cof. 7. 



§. 38. Cum igitur per priorem operationem in- 

 venerimus 



^^ d^.i^ erit 



zdx — xdz _ d 3 eo/. ^ 



At ex formulis initio integratis eft 



zdx-xdz—d^fBd^ — Q^d^, 



quo valore fubflituto erit 



gd ^ _aJ_co££_ . 



quare cum fit z — v fin. "vj fin. vp, habebimus 



Q ^ =: — -y -y <5? Cp cof. ^ fm. >]. 

 Deinde vero pofuimus v v d(p — d ^ fM d ^ t exiftente 



vel etiam 



fMd^=zV2f<vv{tds~-kdv), 

 quo valore fubftituto erit 



Q_=:-coi:^{in.7}fMd^, 

 ideoque 



cof. < fin. VI =: - ^-^^ =: - ^,^|^-^^. 



Rr 3 §. 3P' 



