-*^.l ) ai ( ^pI- 



rnde habebitur haec fradio contiiiua fatis concinna; 

 a 



£*— I 



~ I — a -f- a 



2 — a-f- 2 a 



3 — a -+- 3 a 



4- — a -i- etc. 

 vndc patet, fi fuerit aro, ob ^*— i=a, fore vtique i r i. 



§. 24. Confideremus nonnullos cafus fpeciales; ac 

 primo , fi fit a ~ I , erit 



I 



— o -}- 1 



e— X 



1 -i- 2- 



2-1-3 



3 -i-4 



4--+- ctc, 

 quae frn<fiio faclle transfunditur in hanc: 



t — X 



~ I 



1 



X 



1 -h. 



I -h etc. 

 fnde fit 



9-1 — l-\-- 



I . ? 



1 4- etc. 

 C 3 Hacc 



