330 È. D^ovicio 



f,a) = h^■^pAl^ — -^ fm — kIp, 



frjy = Y2^{'i^ + ^)-\ma-\hv , 



f,y)=z-\f{lBm+lCì)+pc(^lBA-lCk^ìm)-yn, 



f\ÒY=:0, {f,èY = lm-lAl , {f,^y = la, 



fJY = l{Ap-Bf), {f,§y=--lO, {f,è) = y{A+~Ak)-ihì, 



f,iY-=0, {f,sY=~ln+^^Am-^^Bl, {f\sY = lAcc+i^ , 



f,sY = y(2C+'^AB) + ^^Bp-l^Akl-llà, 



f,sY==H'é^'-S)^4,AQ + lka + l^lo\ 



f,CY=o, if,^Y=ln-l^^^>^ (A?r=||3, 



f.,^Y = -y{C^AB)^lBp^l(A+^^Ak)-hm, 



f,^Y=h{^^'-s)+^^Ae-lu, 



f,<;) = y(^AA+lBk + y')-ynn, 



f,r.Y=-^fl-^^¥, {f,rjy = {x^ {f\r) = lfp-\kh, 

 f,6Y=0, if,eY=-UÌ^A + lBk)+^,A^k-^^P, 



f,OY = f{^Al-U) + ^kA-lBh + ^^Ak^+'^lp, 

 f,OY = §^fc^. + \lr^-^-^A)^, 



