a •**■**: 

 c — 



S = 



Vit 

 2 



3 S 



a .4 v ' 

 3-5_7 



3 . 4 ;6 

 etc. 



t/tt 



Vit 



123 



b = ^ 



2 



y ■ 3-î * Vtt 



V* 



h — ±^- 



3-5-7 



t 



7^ 



4_6 • 8 



3- 5 



etc. 



ubi iterum ordo , sectmdum quem hi termini procedunt 

 est manifestissimus. 



§. 8. Consideretur nunc ista progressio 

 B = §; C = |, D~ f, E — \, F — f, etc., eritque: 



A = |, 



a* 



I ijJ i_J? Lli lli LJ? 7-7 

 2* 1.2*2.4*4.4" 4.6" 6.6 "6.8 



unde extracta radice nanciscimur : 



etc. 



« = ^* — -H-M-etc. = 



2.2 4.4 6.0 8. S 



Termini igitur quaesiti erunt : 





C =z 



e m 



3 • 1 



'■4 



3-5 



2.4-6 



3Tï-7 



etc. 



2 



ir 



Jf .1 



3 " T 

 2.4.6 



1.3-5 



2 



7T 



b ~ l 



d =z - 



2 



r ■ ■ 3 - 5 



./ — 2.46 * 



h = 



3 ■ 5 « 



4.6 2.4* s 



3-î-r 35-7 

 2.4.6 



2.4.6.8 



etc. 





§. 9. Adhuc considerari meretur sequens casus ad 

 sériera numerorum naturalium deducens : 



A - flt = 1 . 2 = 2, 

 B=:i)C=:2.3 = 6, 



C z=. cd — 3 . 4 = 12, 

 D ~ de z: 4 . 5 =: 20, 



16* 



