DE SERIEBrS QVIBVSBAM COnSIDERAT. H.. 



I.2.3.4.S 



I.2.3...»9 



etc. 



eritque fac^is (libflitutionibus haec lex 



« zz I 



5 zz: ay-l-S* 



1.3. S ' • 



)c zii a 2 H- 8 g ^ -^- i:i Y >1 + 'iS ^ < -H Vir/ • ^*- 

 Lex haec perfpicua eft , fi hoc modo notetur , quoties 

 poftremus terminus fit quadratum , eum infuper per bina^ 

 rium diuidi debere. 



§. 13. Confideremus nunc hanc (eriem : 

 Az-i-Bz* -^Gz^-^Dz^-^-Ez' -{- etc. 



cuius fummam conftat efie :=z fS^ > ac ponatur 



z iz:^, erit^^ — r^T^-k = 



^i.a/,-4-^r/.2/+?.^2p"4-^*.a/-H etc. 



TT cnf A ^ 

 ^'" 4-4>.A.^ - 1^-^— '^\*-+^s--^etc. 



Quodfi ergo loco Cngulorum terminorum fubftituantur fe- 



ries 



