( + i-^' S h.-O) +i*"S h. C h » -f ^ 
( ^ ^ , — a 
5Sh.i(p~2BSh.I-(?)Xh.-i=^f+ BGh.-i^. 
Comparetur cum propofita , & nafcentur tres xquationes 
2 
, a JL ^A' +B-r. Auferatur tertia a fecunda & oritus 
^.3 ^_5.JL ^ — gBr::— 2y. Auferatur quarta a prima , 62 
fitj.^^B- 3r, feu ^-^^^ 
Si valor 5 fubftituatur in prima , & quarta , evadunt idem* 
ticje , unde colHgitur, unam ex iribus ^^^^ determinan 
pofTe ex aibitratu . Fiat A-o^ proveniet ^ = — r , - 
Hinc fummatoria propofitas — .S h.— f^) +C ii . • 
4 - , ■ 
Si propofita difFerentiah's eiTet y d^^{^h.-^(^ 
4- 2Sh. — (^.Ch.-^(^4-Ch,~-^5^^C""^* aequatio fierel 
A + A-^A'''~iB-=.2r^ a qua fi dematur tertia , fiet quar- 
ta A H- Y A — ^B — ir^ quae detrada a prima dat B= & o 
Itaque in hoc cafu fummatoria caret termino continente(|;« 
Exemplum tertium . Sit ^ = i ,^ = — i , & integranda 
proponatur formula'^-— .( S h .9^4-' 2§h .(p «C h,^.Sup« 
ponamus fummatoriam effe 
L 1 1 y » 
