-44-§ ) tf4- ( l?§- 



§. 24. Hoc autem modo determinatio littcrarum 

 •t) (5) Y> 5, ctc. nimis fit molefta , vnde vt hunc laba- 

 rem fubieuemus , confidcremus fequentem feriem , -vbi 

 iidem coefficientes occurrant , eique deriuatae fubfcri- 

 bantur hoc modo: 



-{■lvzi= -1 H-|a-H^(3 -f-ly -i-|(J + etc. 



+lvz'= -i 4-5« -h 5 p +^y4-etc. 



-{■^-.vz'- -^ +5^a H-^';^(3+etc. 



+ jlo 'vz*- — 155 -i- ilg a + etc. 



etc. etc. 



His igitur feriebus in vnam fummam colledis, ob 



a-i— o, f3+ia-i = o, y + ||3 + ia — ^V^^o, etc. 



nafcetur : 



^(i+.-2;+|2^ + /,5;* + il,s*4-7loS'+etc.)ir-i. 



Cum igitur fit 



e'^—! -\-z-\-lzz-^iz' -^^-,z\ 



e^ — 1 

 cuidens eft quantitatem 1? multiplicari per , ita vt 



z 



^ V (e'^ — i) j ^ — z - 



fit — =. — I , vnde fit c? — ; ficque tantum 



f^ 



opus eft vt hinc valor ipfius 'y in feriem refoluatur, quip- 

 pe quae conuenire debet cum ierie aflumta, ficque fpontc 

 valores littcrarum a, (3, y, etc. fe manifcftabunt. 



§. 25. Quo igitur hinc valorem ipfius v commo- 

 de in feriem conucrtamu?, quia illa aequatio nobis praebet 



