x 4 5 DE MOTV LVNAE 



quantitas A. arbitrio noftro relinquitur ♦ eritque 

 B ~ (a— ix«— Txii^T) atque 

 %~-lnA-{- { ^B et 8=^,-2 «B. 



Quantitas A ideo manet indefinita , vt vel diftantia 

 media vel motus medius ad veritatem definiri pos- 

 fit , ob perturbationem enim , fi c conueniat cum 

 diftantia inedia n non amplius cum ratione 3-5- con- 

 gruit et vic flim. 



XXVIII. Ad quantitates tertii ordinis Q et q 

 determinandas , has habemus aequationes : 



-^n[n^i)dQ I \-{n-i)dq-\-i{2n-i)pd?-\-pdp--\-[n—i)Vdp 



4-3 Pfi n.-vicof y\- f| Cm.y\ ( 1 -5 cofvfko 



r 



(«-1 ) t ddQ :r o.nq-%nnQ : \-2.{n-i)pdd?-\-{n-i)dpd?-pp- zn?p 

 4-3»«PP-4-P(i-3cof ^)-4-H(3 cof.vj-5 cof>f )~o. 



Cum autem fit P=rA + Bcof.-vi 2 et p — ^ + ^Scof.^* 

 erit d?~ — ^Bfin.Tjcof y\ et dp — — sSSfm.-vicof >j 



hi valores in prima aequationc fubftituti dant 



— 2(»-i)S8A — 2(»-i)23B 

 + 3A 4- 3 B 



Tnde 



