io5 



ditiones implcndae cmnt: 



I. 4-aa — 477 (xx -+-//)-»- 2 x/ (5 qq — rr) et 



9 q 9 . 



^^- +// ^ 'i- '■ '■ (^ ^ -^y/) -^ = ar/ (5 r r — c 



J. iT. Qio hns formalas traflabilioics leddamus, 

 ftataamus brevitalis gralia 



^!" = M ct iIJL:^2±il — N 



ac binae acquationes traQandae erunt 



jli — X X -K j-j -4- 2 Mx/ et ;i r= XX -^ 7r -^ = Nx/. 

 Ecce' crgo rcfolvcndac adluic fapcifunt duae formulae in- 

 ter fc fimillimac ct ita comparatac, uL ulramciuc lcoifim 

 facillimc rcfolvcre liccat. 



§. i:. Vtramquc rcfohilioncm fimul fiifcipiamns, fta- 

 tucndo "-zzix-Htj ct L —x-h u /., hocqu.- modo piodi- 

 bunt fcqucnt s formac: 



2 t X -t- f / / = / -H 2 M X ct : u X +- u u/ ~ / 4- :: K X, 



unde duplici modo nancifcimur 

 «_ — — I — 1 1 I — II « 



y '. (— M, u{, -. ,.)' 



IIos crgo duos valoics in'cr fc congriicnlcs rrddi oporfct; 

 qucm in fmcm j;rimo numcraroies accjiialcs ftaluanlnr, id 

 quod duplici modo ficii j)olert, rtatucndo vcl ;/ ~ f, vel 

 U- — t; priori autcm cafu dc 'omiriatorcs acqualcs ficri ncquc- 

 unt, nifi fdcrit Mr N, ifi qtiod ficri ncquir. Sumamns crgo u -t, 

 ac dcnominatorntn acqualilas j)ratbct u -ii: i-^—i ~ — f , un- 

 dc fit ' — ^l-zJll-zJ, hocqac modo iam omnibus condilio- 



y ^ In -1- i^> * 



nibus 



