T)E SERIEB. QFIBFSD. CONSIDERJT, 77 



s^ ^ _. 



I - -^-i- -"^ - —-hr^ etc. 



* l^Z * I.2.J! 1.2.3. ♦ ' l.^.3.4.i 



qnae aequatio abit inhancjin • __ _ ^ reuir=-^. Hinc 



Critur e^s — szize^z et e^=^ atque zz^ls~l[S'-z)» 

 DifFerentiando autem habebitur dzzz.-g — /^^ fiue 



cui aequationi fatisfacere debet valor aflumtus 

 Sz:zi-\-(XZ-\-^z^'^yz^'^^z*+tz'' -^- etC* 

 fubftituatur itaque hic valor in hac aequationa 



|~ — j- J5J-4- j jzzo 

 atque obtinebitur i 



— j5;3=: — z — OLZ ■-' JS<3* — Y^* — ^2* 



4-/— I +2c<2-H2g^*-H2ys*H^2^x;*H~2£;s* 



•4- a* -j- 2 a 5 H-2ay -f- ^«(J' 



-h r -^2gy 

 Hinc igitur colligltur fore i 



§. ^s. 



