APPROPLVQVATIONE METVENDO. 543 



«tiam ratio i? colligi poflfet. Verum fcoc facihus 



dr 



•x ifta combinatione \y — II x fieri potefi, cx qua fit 

 2ddx~-xd±y = - cuius i nte erale eft ^"-^C 



cx (htu autem initiali concluditur zzba—q$zz — h 

 iu v t fit PJypgff.agih, Cum vero fit 



a t 



xzzu cof. (J) et / =z u fin. (J> 

 hincque 



</* — ^ cof.(J)^$ fin.Cj) et #c=</« fin.Cj>-V- «rf$ cof.$ 

 erit x d y —y d x zz uud(p 

 ficque aequatio noftra erit 



.*"*? — £ fiue </ $ — Li- r 



dT ^ u u 



quare loco */ r valore fubftituto habebimus 



*$--==: 



fedu 



«V — £> 6 -+- 2 A u — F u u 



§. 4.7. Ad hanc formulam fimpiiciorem red' 

 dendam oonamu& uzz * vt fiat l!i — — ** ac re- 



a U * 



perietur 



d(pzz - 6c,2J 



Nunc poft (Ignurn radicale fecundum rnembrum £A£ 

 ejidarajss., ponendo zzz s + fc b ac preo.ibit 



_ ~^ hd s 



4 q> — — - — =r.-^^^ 



vbi ponatur 



4-^ — ? — n n h h ita vt 



et 



