111 EVOLVTIO formvlae 



ac mukiplicando has diias aequalitates adipifcimur : 



fa x[i j^) 

 Hic iam ponatur n ~ \ vt fit 



fdx{l%)'-':=i. a. 3 (/-i) 



fumaturque it— 3 ac prodibit 



^^^^^:z9fx^-dxy{i^xy'\fx'-^-'dxh^-x'r 



vnde concludimus 



rdxVHi)'-' % , x'-'dx ^ x''-'dx 

 ^Vp/i .f- . 



Vi. 2. 3...(i-^i) y(i-.v'/~' V(i-A-7-' 



Coroll. I. 



31. Bini hic occurrunt cafus principalcs , a 

 quibus rcHqui omnes pendcnt , poncndo lcilicet vel 

 i :z: I vel i — 2 , qui funt : 



I. /--L^ =y p/_i-£_ ./ -^£_ 



y(/i/ y(i-xy >"(i-.v")' 



II. fJ±-=V 9/^i-. / ^^i_ 



r/i y(.-.v') v(.-A-') 



.v' r/ .1- I d X 

 quae poflcrior forma ob f- —- / -; 



y(i-.r') ^ y(i-.r') 

 35; abit 



