PROPRIETATE GJFDENTIFM. i8i 



— "ZQjfx — Z^dy — ZK^s^.crit itaque noftriim (iQjiz 

 Sdy-\-y.dx-?dp-Tpdy-Ypdx -;i%^ - ZQdx 

 V(i-}-/>/)) -i-ZP dy V{i-\-pp)-\-Z R dsVii-hpp)- Hanc 

 ob rem tiet L-=zZRVii-\-pp) , M.=S-Tp-[-Z?V{i~\-pp} 

 VZ-P-vFtfF)- Ex his ob ^^.''/f — ^f^pp^ atqiie </^ 



~ ; feqiiens eruetur valor ipfius P ~ 



T Kdxd p 



^ ;S-(-Yj<ij:C.-4-f>f)-HZ(PJ;r-H-atyM.-f-fi>)_j_ KdJ>_ r /g ■ yWv 



(i-f-/'/>)-i-2(P^^^-Q.^//) V(n-;)p)-|-;^5p)], 

 Alter.i vero formula /— ^— modo vt fupra tradata 



dihit L — 5^^'-^^^^ M _ PVv-+-f f') ^ v_ ?._ . 



aaoit i^. — .^y^ 5 J'i — ^vjv ^^ ^ — vi^Ci-i-i^f)) '^^quc 



dp p dn} 



Duorum horum valorum ipfius P multipla quaecunque 



fibi acqualia pofita dabunt aequationcm pro curua quae- 



fita, quun autcm vlterius pcrfetjui calcuU prohxitas non 



permittit. ':"rtf- 



6. 28. Sit nunc formula , quae vel omnibus ciiruis I,'!''"'* '*• 



communis efle debct vel in quaclita curua maximum 



minimumue, h^ec jQ^dxjRdx\ fit autem dQ_zzLds 



Mdy-\-Ndx-hydp et dK^Eds -{-F dj -hG dx 



Idp. Dabit ergo haec forniula pro elememis ^^f </ 



I I ri 



hanc expreflionem QdxjR dx -\- Qdx /R d x-]- Qdx 



11 



jRdx. Huius diffcrentiale fecundum data praecepta da- 

 bit \t fequiuir; 



2 3 d.Qdx 



