- Si ■ 



§. ^::. Pro allera foima BC fupra attulimus hanc 

 aeqnationem: 



(BC)~(BC) = (CH-(By 



Ciim igitur fit (B)=(C)i=^, fi ponamas {BC)~(^:n, 

 erit 



TI m --iL -4- n — y q n — P — > 



Tn Lcmmalc igitur noftro ftimamus i = r , ut fit 



(p : n ~ A n (n' -»- a\ ficrique debet 



Aarn -l-n) — '" ^-^. 



Siima^^ur ergo piimo n' — n — H — y, ut fiat A a — f , 

 ideoqae A—-L, ficquc ent coenicicns qudefitus 



TI 



( Ti f \ t. (2 1 — 3 — ". ) £ n n t- a — 



.''--y 



f. -3. Ilinc ergo pio fccundo oidinc tcrmini formae 

 BC ercint (B C) rr: Li . «jH-^-JLhI , hincquc 



a 2 c rt 2 c 



a 2 i 



qtiib:!^ fi adiungnnlur termini foimac B* modo antc inv rti, 

 tolus ordo fccunJus iam eft abfjUitus. 



Invcrri;;'.irio 

 Tcrminoiiim tcrlii orlihi*?. 



$. 24. Piima forma in hoc oidinc occurrens eft BV 

 pro cuius cuefiicicntc fupra naQi fumiis hunc acquaUoncm: 



