14-2 MEDITATIONES CIRCA. 



2. Qiiod fi iam feriei i + — + — + — + etc. 



234- 



in infinitum continuatae fummam per/— defi^ne- 



mus , vt fit 



I I 1 I X 



^ + ::^+::^ + 7^'+7^ + ^t^. — / ^^ et 



I I I I I 



i + ^+ rs + ^ + yi + ctc.~/^ 



fimilique modo pro ierie liinc conflata : 



I X I I I 



•*" >i T V "** 



atque ex his fequentes duas fcrics , quae in forma 

 propofita continebuntur , ibrmemus: 



i+|^Ci+fj+^(i+f.-i-^,)+^(i + ^+^+^J + etc.-P 



£X principio fupra llnbilito habebimus: 



I -I I 



P+- Q.^f'Z^i'f-Zi -i-fz^;^ 



vnde fi alterius harnm duarnm nouarum fericrum 

 fumma vndccunque conftaret , hinc alterius quoquc 

 feriei fumma afii'^nari pofict. Summas autcm ferierum 



I 1 I .1 



I -i- ;:;s -1- T^ •+- T^ H- etc. feu f^ 



hic vt cognitfls fpc<flamus , quandoquidem qucties 

 exponens ;;; eH numtrus par , hac iummac a nc 



per 



