74 ELEMENTA 



Ex his omnibiis colligetar variatio quaefita SfZdx-^r: 



-W7^,/.t^n.^J'-i-P^^-+-q'^'-+-etc.) • 

 -^ /SS^x(n5j'-+-PT?'+-q'-^''-Hetc.) 

 H-W/^;f(5^^j-4-'g>'^^-i-0/-^' + etc.) 



Coroll. r. 



42- Si quaeratur variatio formulae J7.dx a va-- 

 lore a: — o vsque ad vaL>rcm determinatum x — a^, 

 fumjntur i'itegr.ilia W— /L</x, 553— /S^a^ et 

 35— /Wrt'^®, it'i vt euanefcant pofito ^'"o, tum 

 vcro fi(flo A-rztf iiat W.-A , 5B=^5l et 35 = 33,, 

 qnos viilores in f<)rmula inuenta loco litterarum W j, 

 5S5 et 35 > vbi extra fignum integrale occurruut , po» 

 nere licebit. 



CoroIL 2'.. 



45. Ponatur ergo ad abbreuiandum : 



NM-(A-W)?n-h(A5i-33-A3B-f-25)li-(Ny 



p -f.(A-W)q)-H(A5(-35-A3S4-35^P = (P) 



Q__^(A-W)n-i-(A5r-33-A3B-i-35 a-((^) 

 R^(A-W)3{-i-(A5(-23-A2a3-i-25jv=(R) 



etc. 



ct variatio qu.iefita formula^/Z</4f vsque ad valorem 

 determinarum x—a erit : 



Jrf4(N)^i'4-(P)^^4-(Q.)^.--i-(R)S-}-etc.) 



CoroU. 



