PROPRIETATE GAFDENTIFM. 163 



qiv.intitatcs eniiri Xyjets apun<flo<7, quod vtrique cle- 

 nKiico ^/> et ^?? comniane ell, pendeut tantum , idcoque 

 inuariatiic m.mcnt. 



§. 6. Diftcrcntia ergo inter exprcflloncs , quae ele- 



mcntis aO ct <?§ rclpondcnt, obtiiicbitur fi Q^</.v diflle- 



rcntictur , ct loco a' j, dj et dx fcribatur o , loco dp ve- 



ro j^. Cum autcm fit differcntiale ipfius Q^</.v — ^/Q^^ji- 



,:zziLi^s-+-Mdy-i-Ki/x-i-V(ip)dx, erit illa differen- 



1 

 tia —V.d^. Porro cx expreflione Q^dx elcmento bc 

 I I I I I 



rcfpondente , \bi Q^ eft talis fundio ipfarum j-,j, a', et p 



qualis ante erat Q^ iplarum j,/, .v et/), inucnietur ex- 



prclfio rcfpondens elcmento §f, fi loco j — B^, fcri- 



II II 



batur j'-l-^S; loco s — oa-\-ab vero s-\-^m — s-^ 



I I 



^^^p. atque loco ;>— ^JJ ponatur p~^- Qiiamobrem 



diflfcrcntia inter exprclfioncs elcmentis bc et ^c habc- 



I r 



bitur, fi Q^f/.v diffcrentictur et loco <// fcribatur ^&, lo- 



I I 



co ds vcro ^^^ atque loco dp ponatur — ^, Cum igi- 



I 1 I I I I I r 



tur fit ^Q^^.v ~{hds-\-U </j4-N dx -\-V dp) dx, crit 



I I r 



haec difrerentia —"^J^Lkl-^Mdx.b^-V.b^S. Dif- 



fcrentia ergo inter exprefliones elementis al>-{-l>c et 



r 

 elementis «S-f-St- refpondentes erit {V-\-~^ ^ 



Mdx-V)b^ :iz(H^-^Mdx-dV) b^ — ?.i^. Aequa- 



X a tio 



