JITIORFMGRADPTM INTECR. PROMOTA. 33 



V. Si formulae P fa&or fit zz-£kz cof. C|)-f-kk 

 Ponatur : 



■5J)^B4-2Qcor. (|)-4-3Dik'cof. 2Cl)-f-4Efe'cor. 30-^- etc. 

 g(J=: aQfin.Cji-i-sDyfc' nn.2CJ)-t-+E,t'rm. 34)-Hete. 

 erit pars integralis fiiftori zz— ikz co(.CpH-^ik relpondens : 



VI . S? formulae P /«-(??(?/' /iJ ( z-z - 2-k z cof. Cp -j- k k J* 

 Ponatur : 



§9^— C-H3Ditcor.Ct5-f-5Ercor.2CP-4-ioFfe*cor3Cj)4- etc. 



fft= 3D/fefin.(p-^6E/k'fin.-2Cp4-ioF/(:*fin.3C()-i-etc. 



erit pars integralis fiidlori ( zz—zkzcoC.Cl^-i-kky refpondens : 



2^fex coj. q) r(?^cof kxCm (p-hf^Cin.kxCm.^^^fdxfe-^^^^^^-^Xc/xcoCkxCm.^^-^-l 



Wf^' ?(5kfin -^-fini- 9^cor./:.vfin.Cl))/;/.t/r^'^'°-^-^X</A^fin./b;fin.ci) S 



VII. Si formulae ?faCtorfit{zz~^^zcoC.(^-\-kk)' 

 Ponatur : 



Sjyj— .D-+-4E^cor.Cj)-H I oF/:'cor 2 Cp-t- 2 oGyt'cof 3 45-j- etc. 

 f)^— 4E/fefin.ci)-}-ioF/i'fin.2Cf)-|-2oG/k*fin.3Cl)-f-etc. 

 erit pars integralis fadori (sjs— 2^ cof.Cj)-f fc^)* refpondens : 



li^^^^^^S^^coCkxCm.^^^^^rm.kxCxn.i^^^^^ 



^""+91 C,^fin.b;fin.Cl)-g^cofit,vfin.4)yrt'.rj^.i/r''''<="^^^^ J 



etc. 

 Onnncs igitur if^ae partes fmgulis fiidoribus fbrmulae P 

 ■refpondentes in \nam fummam coUedae dabunt ■valorem 

 ipfius y quaefitum. Q. E. I. 



§. 23 Explicata hac regula , cuius ope omnes ae- 



quationes differentiales in forma generali contentae inte- 



Tom. III. Nov. Comment. E grari 



