(48) 



ynde feries fnmmanda erit 



S — i-l.l-^'^.^^'-i-'i±l.^S^-i- LIilil . ^JLLlil^ ctc. 



" ^ ' ».4 C.4 ».4.6 1.4.6 ».4.0.8 2. 4. 6. S 



at vero formula noftra integralis pracbet: 

 S z=.^rdx(i —xx). 



Eft vero pro tcrminis fummationis ftabilitis /5 x^i— x-a-^zZj, 

 quamobrem fumma quaefita erit Sz^^^i-. 



V. Sit a ~ — 4.. 

 Hoc ergo cafu fiet 



21=: — 2, 55=1, (£ = 0, S)=:o, ctc. 

 vnde feiies fummanda erit 



S n: I -H-i-^zi:l^^=:i, 



-■4 --4 



at vero formula integralis praebct: 



s = -v/a X / (i — .V xy = ^ /a .v {x-x xj. 



Nunc vero per redudionem cafu 111. adhibitam , fumto 

 azzri, b znz 1 et <-rz:3, habebimus 



fdx(i ~ xxfz=:lfdxy(i —XX). 

 Vidimus autem effc / D a- / (i — -v .v) = 4, vnde erit 



fdx (1 —xxy — \7, 



tx quo colligitur (umma quaefita 5 = ,, id quod egrcgic con- 

 venit. 



Problema 4. 



§. 22. Retcntis Ijiterls tam Latinis A ^B^C^D., etc. quam 

 Germanicis 21, 33, Cl, 5D, etc. et iisdcm ^^aloribiis ., quos ipfis in 

 praecedente problemate ajfis:nauiwus ^ inuejUgare fmnmas fequenti- 

 utn ferierum ex iUis compofitarutn : 



