iift DE SINGVLARI 



ct formulis affinibus elifis 



2 ak[n]' -aCka - h')r''- 2 b[n]Va[nX -(k a" - b"]}'") 

 ^- -■ k. a — b 



quae cum ante inucnta congruit. 



C o r o 1 1. 2' 



§. 117. Eodera cafu v — n formula affinis col- 

 ligitur : 



[^!i]V k-V {k[z}f[- -ika' -b'')r''' — 

 -zkb [n]" -f - 2 « [«] V {k [«f -{ka"" b') r") 

 -{-k(ka'-li')r'' 



_ -zkb^nf + bCka^-b^^r ^^-^-ia ^n^VC^uy-ika^-b' )}''} 



*~~ ka — b^ 



Coroll. 4. 



§. 28. Ope harum formularum iam facile erit 

 terminoi feriei ab initio quantumuis remotos affigna- 

 re , quandoquidem ex binis quibuscunque [>/] et \y\ 

 reptritur Itatim terminus [n -\- v\\ intcrim tameii 

 ex lcge , quam fupia iam dedimus , pro tcrminis 

 [k] , [« + v], [« + 2 y]; \ji -h 3 »'], [n + ^ A efc. haec 

 lencs multo facilius , quousque libucric , continuari 

 potcft ; fi enim ponatur v* + /<" — 2 tt 5 ita , vt dt 



=/g 



. i ah frt] — i i [ n] V <! » 



— /e a= — 6« ~ ' 



lcx progrcffionis ita fc habct 



[« -h 2 k] — 2 71 [/j --1- v] — r* [«] 

 [«4- 3 v] r= 2 TT [«-h a vj - r* [« 4- >-) 

 1 ctc. Pfoblc- 



