Cum enim fit 



l 5 J. 1. », 3. 4 . . 5 



r_p_-] — p(P-i)JP-i)(P- 3) . . (p-g-i-O . 



Ig—lJ ' I. t. T. ♦ . q-i » 



prior forma aequatur pofteriori dudlae in P"^'^' , ideoque 

 crit 



qpocirca habebimus 



quae forma manifefto conuenit cum hac: 



l^ 2. 3. ♦ 1 



quae ergo, more fignandi recepto, ita refertur: [^^'], ita 

 vtfit[-|]4-[,-i]:^[.^t-^ 



Corollarium i.. 



§; £4.. Si Iqco ^ fcri.bamus ^ -H i , formulis per- 

 mutatis erit 



[-^] + [ji-] = [f::H] 



fimilique modo, numerum 9 continuo vnitate augendo, erit 

 etiam vt fequitur: 



[r:-]+[r:-^]=[F"-i]i 



[,-!-]+ K-J = [^:t~i]; 



[4t] + ['.^3=[|^^3' 



[fi7] + [^T] = [f^]i 



[,-:i,] + [5iT]=[|5i]- 



ctc. ctc. 



Corol- 



