TRIANGVLORVM. 



9t 



Ob Azry(/*-4^^^^) et fcalam tchtionis fff-bbcc 

 inuenicmus : 



£ valores ipfius V 



= ' ff 



ZZ2 f-^bbcc 



= 3 f-3bbccff 



-4 f'-A-bbccf*-^2.b*c* 



-5 r-5bbccf-{-sb\*ff 



-6 r -6bbccf-^9b\-'f*-^b\' 



-7 r-Tbbccf'-i-i^b\'Y-1^'<^T 

 vnde generatim colligitur fore ..... Vzr 

 /"■ ibbccp'-*-\- '^^b\-*r'-' _'ii_il'^^^«,.Y^'— ^. etc. 

 Deinde pro altera forma W =r j^ (-LB:^)' ~ ^ (^^'^ 

 fequens nafcetur feries : 



ifi il valores ipfius W 

 i:i:o o 



= =■# 



^3 f^-bbcc 



-4 f^-tibbccff 

 -5 f — ^bbccf^-^b^c* 

 ~6 f'-^bbccf-\-3b*c*ff 

 -7 f'-5bbccf-\-6b*cy*-^'<^' 

 vnde in genere haec fbrma erit . . . ^ Wrr: 



-^r^^V7^^--^etc 



LU 



M a 



vbi 



