,x-+- ix' — «x»-+- jii*— ijox:5_(_ -jox* — 50*«x'-|-*fc. 



224 DE5Ei?JEBr5 



f. 21. Datur Tero alius modus in fummjim hu- 

 ius feiiei inquircndi cx natura fradionum continunrum 

 petitus , qui multo facilius et promtius negotium con • 

 ficit : fit enim formulam generalius exprimendo : 



A =ri— iA,-+2.Y*-5A:*-f24A'*-i20jv'4-720.v«-5040A-Hctc.— 7:^ 



eritUzr: — ^ 



eti+Cz: 



P /1 _ Xj^ ♦«* -+- I9X»- 9«X*_f-603rS ^,,Or«_f_pfc. 



*UUC.l>/_-, _ ^jj _^„3tJ_ p6xl-f- <iOO;c+_efc. ,_f.K 



porroii_r~:zr-,x-Hr"37l*^.4ox^.+-T?^ = 7:^ 



/\i4ucr_ , _ j,;£ _^ 72*'— 6oox'+.ff«. — 7:^:0 



EritG^':^,?-^^ ^_i^ 



SicHz:^^ - -i^^ 



Sicqueporro patebit fore 1=4^, K:=77f^-, Lrr,^^ 

 ctc. in infinitum, ita vt harum formularum ordo facile 

 pcrfpiciatur. His autem valoribus fucceffive fubllitutis, 

 €rit 



jX'-f-6*»_2+X^-+- ljOX*_7..0;i.5_+. 



9 6j:*-f- 6001S — ^^^.o rtf- 



s*x^-f-i2oX* — 7»oj.5_f_efe. i-j-D 



I x 4- 2 a' - ^.v* H- 24 A*— 1 2oa' -1-720 .v* 

 — 5 040 /-4- etc. — 



A = 



