MJxiMORm ET mmmowM. nj 



^efioienda, afliimfimus effe $f2dx-J^(Zdx)-J^Z.dx\ 

 quia §{Zdx)=$Zdx-hZ§dx , eft vero ^dxzzo j 

 vti^a — o. Quin etiam fi occurreret integratio gemi- 

 nata //V, foret eodem modo 



XXXIV. 



Alterum artificium in transformntione integralium, 

 quando poft fignum integrale figna d et $ inuicem 

 coniunguntur , \t faltem in integratione fignum <5^ foli- 

 tarium relinquatur. Ita propofita formula integrali 

 JV $ d V, ob S d V zz d$ Vy confiderando ^ i) \ti 

 quantitatem fimplicem , erit 



JV Sdv:=:JV d$v—V $v-J^rjdV. 

 Eodemqne porro modo perfpicitur fbre : 

 JVdd$vzzWd^v-^vdV'+-JSvddV 

 JVd'Bv=zVdd$v-d$vdV^^vddV-f$vd'V 

 jVd*Sv=:Vd\$vd'6vdV-\-dQ vddV-^vd^V-^-jSvd^V 



etc. 

 c^ Qinm JVdd$v—Vd$v-Jd$vdVj at cft 



Jd5vdV=z$vdV^JSvddV 

 vnde ratio liarum transformationum pcrfpicitur. 



XXXV. 

 His regulis analyticis praemifils non erit difiScile, 

 omnes quaeftiones huiusmodi circa maxima ei: minima 

 refoluere , etiamfi in formula JZdx fundio Z formu- 

 las integrales quascunqiie in fe continear. Totum ne- 

 gotium, (cilicet, iiuc redit , vt incrementum $ JZdx f 

 quod formula propofita jZdx^ dum a ftatu principali 



P a jn 



