40 DE VALORE FORMVLAE 



,_ [ Z(l -+ -Z Z)d_ zlz 7TW pj- 



J I _+. z 6 $ + ' 



/~ — -z(i _+- z z) d z-l z r — zd l z . tttt 



" ' I Z« J : — ZZ + Z* 17 " 



Hae autem duae formulae ponendo z zzzv abibunt 

 in fequentes 



— „ V (i T>) ZjU .— - 2 "7T 7T 



'i -+- ^ 5 i; 



dV IV 4 7T TC 



t r_____J^LL'__=___II__ — 2 "K** ptr 

 X ' ' ,i _+- _ s — 7T~ ' 



III*. Sit A — + et confequemur 



-zz(j-zz)dzlz 7r7ry v _i-_l TnrV2-V_ 



- zz(i +zz)dzlz — zzdzlz tt_i 



*-!/ 7~S — -f) 



l-Z ' (\-ZZ\\+Z)" l6[2+V 2.) 



<quae pofhema fortna reducitur ad hanc 



/ d zl Z t f{ I 2 Z) „ 2 I Z ___ 7T 7T _ 



"* i — zz * J ' r+i> — - _ (. _+. y -) 



€{_ vero f-^~ ?3 v Vllde reperitur 



fdzl Z (i Z 2) . 7T 7T (I _f _ V ;) ___ TT 7T 



./ ' .1 -+- Z* Ml + V^) < V 2 



( qui valor iam in fuptriori calu X ___: .2 eft inuentus. 



$. 13. Nihil autem impedit , quo rninus et- 

 iam faciamus X — i, dummodo integralia ita capian- 

 tur vt euanefcant , poiito z ___: o , tum autem repe*- 

 riemus 



i° r____j_i______L 7 __ — 00 et 



* * Z(l -+- 2 Z) 



*••'/• 



( I _+_ 2 Z) d 2 Z 2 , 



OO 



2j(l Z Z) 



vnde hinc nihil concludere licet. Ceterum etiam 

 noftrae feries fupra inuentae manifefto dedarant , ea- 



rum 



