$& DE EXTRACTIONE RADICVM 



vnde erit jx z= a ( - '-=^— ' ) 

 atque v — % ( - ^±4^ ) 

 His dcfmitis pro vnloribus ipfms x fupra §. 45 inuenti^ 

 fi valeat p eiit ct ~ 1 , S =: 1 

 fi valeat r/ • erit a. — - '-^— • S = - -^^— 

 fi valeat >• ; erit ar- s=£=: ; 6 =■ - ^— ' 

 Atque cx his prodibit formuhrum irrationalium V(/>/>-4)i 

 V(##-4,) et V(;-r-4) valor vnica exprcllioue contcn- 

 tus hic : 



fubititutis ergo loco a et § iiugulis cafibus valoribus de- 

 bitis repericntur fcquentes feptcm radiccs aequatiom:. 



x ? — 1 ~ o 



I. x — 1 



v! j|*="*-(- '-t^7(-^)--(-^7(-^) 

 ±^+4>'(- , ^)V-7+;^(-a*PfarV K-7 



VT 1 



vn^-H-'^7(-^H-^)V7(-«^) 



^^^(-'^(-^-r^T^^n-' /-7 



§. 47- In vnaquaquc harum fbrmnrum praeter primam 

 continentur quntuor figna radicalia cnbica , at m quaUbet 



bina eiusmodi figna in vnum colligi poflunt. Cum enim 

 fit vt iiipra oftcndimns ; 



/ 



