102 



BE SVMMATIONE 



u . e* I a__ . l_ C , 



nuiUS a. aa. ga~ T ~ {a-j-b) (aa-*-c)(€a-Hc)^(a-+-2&Xaa-+-2&)(ea-H2~~' 



dy 

 -4- etc, fumma erit ly'~ (L ~~ ^yjy^ ~dyf V 



et ita de reliquis omnibus. 



§. 18. Sit bzzza, vt fiat _-:~=i> erit fs$z~ 



m A — _-/(i- y). Quia pofito yzzzo totum intcgrale 



fieri debet ~o f erit Azz o , adeoque f k{\ d Zy ) — 



~-J*/(i— j). Multiplicetur hoc in y*— 2 dy habebi- 



y a ~~ 2 dy 

 tur /(i- ^). Huiusintegrale vt inuenia- 



tur ponatur i— ^yzDZ, erit^zri-2, habebitur igi- 



(l— z) a ~~ 2 */jS , , (a_ 2 } 



tur mtegrandum lz — U— , z -+- 



(^KopL^ 2 _( «-2)(a- 3 )(a- 4) s 3 ^etC.) £ /*. Qufc 



21-+-» Z^^lz 



vero z^dzlzzzzQ—. ; _-i ; > erit illius 



integrale haec feries ^-f C — z-\-zlz -f- —^ z 2 — 



Hoc integrale fi fiat yzzzo feu zzzz\ debet fieri 



hi. • /i (a — 2) 1 (a — 2)(a— 3) 



anc ob rem erit C — i — i~-r m --+" — -7 2~~~r 



__ (a— -_2)( a— 3Ka— 4) pfr 

 1.2. 3. 16 CtL » 



§. ip. Perfpicuum eft ex hoc integrali, quo- 

 ties a fit numerus integer vnitate maior, tum 

 femper integralis eius terminorum numerum fo- 

 re finitum, atque ideo fummam progrefiionis de- 

 finiri. Attamen etiamfi terminorum numerus fit 



infi- 



