77 



4 ' 



C zr: (>t — 3)(Tt~-4) 25 — . (w-~8)« — 4) a . 



8tre — 2i 4. 8 * 



D mZ (n — 5)(n — 6) Q _-. (n — 4) (n — ?)(n — 6) A . 



I2lB— 3) 4.8.12 ^ 



E ZZ: (" — 7)(n--8) r) ^ (n — y)(n — 6)(n--7)(n — 8) ^ . 



16(71 — 4) 4. 8. 12. 16 ^ 



etc. 

 ficque prior feries pro quantitate v erit 



Az^~J— f^-^^ A:^^"-^-^'"-^'^'""^^^^^-^ — etc. 



4-8 



J. 43. Ex hac autem ferie altera fponte eruitur, fi 

 modo loco A fcribamus §i et — n loco n , vnde valor cora' 

 pletus ipfius v binis fequentibus feriebus exprimetur: 



C Afz"~'---tnzz2)z"— 3_^i!L=illi:Lri±'z^--^---etc.) ) 



41— / 4 4. 8 { ' 



''/-t-^(z''^'~^-i-^It±21z'~^^^-i-i^2-tlBl±J}z'~''^''^ -H etc.) ( * 



C^ 4 4-8 ^ J 



J. 44. Nunc autem fupereft, vt iftam formam per 

 feries inuentam cum forma finita 



i;/(zz^i)=/[z-+.|/(2;z-i)r-+-g[z-+-y(zz-r)r%y 



concordem reddamus, quem in finem tribuamus ipli z valo- 

 rem infmite magnum, quandoquidem hoc modo in binis fc' 

 riebus prae terminis primis omnes fequentes euanefcunt, ita 

 vt hinc iit i; — A 2""""* H- 2i z"""—'; at vero ex forma fini- 

 la, ob /(zz—i) — z, erit i)zzz:/(2z)''-+-g(2z)--% ideoque 



v^ 2"/z"— i-l- ___^___, qua forma cum illa comparata 



2."- Z 



euidens eft fumi debere A = 2"/ et 21 zz: A . 



K 3 Pro- 



