FORMVLARVM DIFFERENTIALIVM. 205 



Hinc vero fit 



(1^)= (- P (a'-H w)- (a-j- p a:-4- Yr) - eCj -f- w)) ^' 



(^^)=z(-y(.v-f-/;0-(^H-e.v4-«^;)-<^(:K4-»))4>' 

 vndc 



Cp'(efj'+«)(<^-ie.v+^i')+l3(A-4-7;/X<^+a-+^j)-Y(.r4/«)(a4f3.v+v>')"\ 



-^(^+")(«-iPA+7>')y 

 fieri igitur debet 



-(a+|3 .v+y >•)'£ (.v+w;)+ ^( y+«)) 



+ (^+e.v+^ jj')^ Y (i^+w^-H (3 ( .v-i- w ) )z: o. 

 feu 



(^+£.v+^>')^p;;7+y «4 PA-+y>') 



- (a-i p A- + yj) (e ;;/ + < ;/-i- e -V -^ ^ jy ) — ©. 



Quae conditio manifefte impletur , ftatuendo 



^m-\-y ti — a. ct ew + ^w— ^, 

 Tnde obtinemus 



Per fe autem euidens eft, hunc ir.ultiplicatorcm cum 

 prius inuento prorfus coincidcre. Vlterius Tcro ob 



/Mfl'.vrr/^^(^J;(a4pA+yj)+/^j(^J)(^ + e.v4 0)+/^(P^A' + <<y) 

 =/(^^-lf|)+'^>'(,^):(«-ip.v+y^)+yct):p^A-+y^j), 

 crit 



/Mdx — <p{a^px-hy}Oy 



Cc 3 fimili 



