83 



tiim vcro sin ita inter se combinentiir ut i dacatur in 

 RdP, 2 vcro in P9R, reperietiir fore: 



cxistente 



RdP P3R 



sin. (^ r= /rK3P- 



CK. d p — p a R)i -(- (Q^a p — p a sij- 



Ciim autem sit f =::- — — , habcbimws differentiando; 



pp 



'2 1 



unde porro facile derivatur : 



Simili modo cum sit p- — ^"'""'^^ difîerentialibus sumtis erit 



paR — Rap (p'q — ^' p) z dx 



pp — ^j » 



unde pono scquitur fore : 



Rap_paR3:::: (PjL^upllî, 



zi 



Denique ob ^ =: ^"~-^ erit : 



gaR — Rag, 'j_ ax rf- (--_ .^ .xj-f-a'gÇp» — >)j 

 S.Q. ■ "" (z — qxi^ 



unde j multiplicando per CI, fit: 



His valoribus inventis, facile Inde derivantur sequeiir 

 tes dcterminaliones : 



11» 



