— 3(J3 — 



ed avendosi (17) (2) ;i^ ^^„ - '. ;--•<.;(■ ^^ .:, , ■'r^ii;*^; vi 



(-dAJ=-2«A(3^;-19«;«.+27«.«;) '-^V 



I * 3 



=- 2(3^; — 16a' «,^-^2a-)<:^3-56a.a'' , 

 (^) = 2a3D,(3«;- I3^,aja^ ■ "' " ' - • '-U < 



~2{Zct] — ICa,)aJ<X3— 2(0a; - mct,u,)ct'-2\&c^ , 



3 3 



("df )=^^('='i~'*^-)^^3-- 2(9^; - AOct,ct.^)A,ct] 



sioUerra (4) (16) 



(38) Af =8=i-2(3«;-8«j2^ . 



-+-2(3^; - 16a; a,H- l2a^V28a.«3)2= 

 — 2|(3a;_.|6aJa^'-(9a;-C0a.aJa3-l08a^J2 

 --2^2(a'-4aja^-(9a;-40a.aja,a3-f 3(a"- — 24aja'} . 



