90 PROPRIETA.TES 



C O r O l 1. 2. 



28. Quodfi ergo has conflituamus formas : 



i hb — "g ->-cc-| -A ' _i_ 1 / 6&—a(r - f-cc — A\' — ■_ Y 



1 6 fe _ g a-^-c c -f- A \' _ _i_ ( 6& — aa->-ec — A '/ — \y 

 2 A^ 2 ' 2 A = 



quarum ytraque eft rationalis non obftante fbrmulji 

 irrationali : 



An Via^-^-b^-^-c^—zaabb — zaacc — nbbcc) 

 z^V {{bb-aa-^-cci-^bbcc) 



pro cafu B=r2/A erit 



V -\-[bb-{a-^c)*)W zzo 

 pro cafu vero B~(a/-4-i)A erit 



{jb -a) y-{-b-\- a){{b-af -cc)Wzz o.. 



C o r o 1 1. j, 



29. Quodfi pro fingulis valoribus numeri in-' 

 tegri i ambae formae V et W euoluantur , binae 

 exorientur feries recurrentes per eandem fcalam re- 

 lationis bb-aa-hcc , -bbcc continuandae , ex qui- 

 bus deinceps ambae illae triangulorum proprietates. 

 fecile exhibentur» 



S c h o 1 1 o n. 



30, Quo has feries fuccindlius exprimamus 

 fit breuitatis gratia bb—aa~hccczff j et pro ferie 

 priori V =z {^tlstAf 4- (//^y 

 .y ' ' Ob 



