Solutio. 

 Evol\''amu5 primo roimulam 



/ (i -{- 2.) — / (i -\-y cof. d -f-y / — I An. ?) 

 et comparatione cum fiipciiore forma gcncrali fada eric 



n =z I -f- j- cof. V cl b ~y Cu\. C , 

 iindc colligiUir 



I (i -i-z) ~1 \' (i -^ ^ y cof. () -r-yy) 

 -I- V — I Arc. lan<;- ^ ^'''- ^ . 



Ilinc au!cm alter cafus /(1 — 2.) fponle dcrivatur , fumcn- 

 do y ncgalive, eritque crgo / (i — z) — 



ly (i — c y cof. ' -i-yy) - 1/ — I Aic. tane;. -^^^i^ 



Sacpcniimr-ro atilcm 111 intrfrialibus occurrrrc folct 

 roimuLi /j-^^i cuius crgo valor, pnfito 



X — y (cof. ^ 4- / — 1 fia. ), 

 fequrnti modo c.xpiimclni: 



j — z - I — 2 > t^ . 



-^y — 1 Arc. tang. ' -.^-h >/— i Ait. iang.^-~lJj-j ,• 



«juarc fi ambo arcus in iinuui contraliantur, prodibit 



/i-^— i/L- ;' : Air. tans. '^*^^'. 



PrLU;icni'ii ". 



J. I-. ric;<{i'.a foimulii Ing^uriLuniica 

 1(1 - ^ ;^ cof. (.'\ z%), 

 fi in cn fjoi.ittur z ~ y (cnf 6 -^- \^ — ifi'f.>), lius lalorcm 

 ad foimulam poftuhitam A -\ li \^ — i rcdmcrc. 



Solii- 



