~ 1208 — 



1 t)^z <)^z ùy^ ìH à'^y dy 



^^ ix^ ^y^ dx^ i>y'^ dx"^ dx 



+3 



y^ 



ì^x^ìiy àx 



fi?/ 

 -r-+3 



— — ^ H 



;)23 dhj 



-^ -f-3 — 



dxiy'^ àx^ <)xòy dx'^ 



-vf4 



^4 



'<)?/■* da?^ ciy'^ da?^ dx- ()i/^^ dx dx^ [_daj*J 



d^z 

 d^' 



ìiz dhi 

 11+4 



òy die' <)£c^()jy du: 



D ^z d 1/ 



;)*: d{^ ;)^z d?/2 



Oajc^y^ dx^ ìix'^iy'^ dx* 



òx^òy dx'* òxì^y'^ dx dx"^ 



i^z dt/ d^v/ D 





d^z 

 dx^ 



+3 



cV': 





iixr'iy dx 



i)5z dy* D^z dyS 



:)5z dv^ ^ ;)^'z dv^ 



-i! — I-IO -^ 



().7j^<)?/* d.x'* lix'^òy^ dx'-" 



—-. -Ah- 10 



dh/r ì)h 



dxòy'^ dee* ()?/^ dx'-' 

 ìì'^z dy* 



+ 3- 



a*z 



ì^xòy^ dx^ 



ì)y* dx^j dx" 



dx\òx^ììy ' Jx^Dy* dee 



y^z 



d?/ 



<)a;*«)y 



^^z dy ()^z dy*1 Dz d-'ii ìi^z dhf d^y 



'òxòy'^ dx òy^ dx'-] ìiy dx'' ì)y* dx^ dx^ 



+S 



i*?/r D^z i)*z dy' 



d;»* 



J)xì!iy <)y* d5c_ 



-hisfi^ 



^^- ^y]rd2y"2 



Del pari si ha : 



[_().x'Dy* <)[/^ ()a3jLda;*_ 

 d^z 

 dx^ 





i^.)xV V'^^f//d^ V^y^^d^^ Vi//d^^' ' 



\<)a;^/ \ ì)x''-'iy, dx y^x^y^/dx"- \^y^/djj^ 



p,~ 



l\:ìx:iy/ \hj\hxjdx'' 



òyjdx^ ' 



