SVMMANm FROGRESSIONES. 93 



ap d( x^ d X'*' s') ^-pii^-^a-n) x^ -+-''- ' 





a(a-i-pr (««-f-pj ^ -^^H-r- 



P 



Vnde eft —m — >va ^ j^ 



3J2 (a(;i-i,H-^3)=^''*'^-'"\'" 



.r" 



— j. Et fiimma progrcfTionis 



(a-f-p)^ (a«-^P) 



(3. 



in iiifinitum dcferirinabitiir aequatione ^^"'•'^"'''^>/ 



y^^dx"" 



flC 



— I -I- j. Similiter fi faclores fuerint cubi lumma pro- 



grelTionis "ir^l^-f-^Ti-ppII^pjj -t- etc. in infinitum J 



(3_ 

 inueifietur ex h;.c aequatione '^^dix_d_x^)2l_, 



— I -h i. Atque itii porro pro fequcntibus. 



§. 19. Sint nunc coefHcientes potcntiarum ipfius 

 X fracliones, quarum tam numeratores cuam den( mi- 

 natores fmt fadla ex ccrto fadorum numero pro indi- 

 ce, cuiusquc termini crefccnte conllantia. Ita fit pro- 

 §^f:^F;^fi^a haec ^-|-[f^f^^^ _l-_-+- 



[a-+-t3) (« ipi-^'''^ huius fumm.a ponutur s^ erit pfx^^s 



M 3 dx- 



