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  !"#$% &' '()*+, ,-+&' '()+./% !0"123.'-4%5*+ 6778'-"+97 (1 A 3 2 2 3 2 2= + − − 81 1 1 B 3 1 3 1 = − − + !0"123.'-4%:';'77)<= +>? (1@AB3@CDE1 81@ F C@ACGE1 !0"D123.'-4%!)<= +>?@AB4B%@CBDE42HI+(4JK%1 (1L7.M428'N+)<= +>?7O(' 'P4CDQIC1 81> +><& R)4E2S4JK "#$T<= 8UV+ )<= +>?.W 77O 'P4T<= 1 !0"F12.'-4% <X 9 ) +>I+'."(YL0#TZ +><& 67+0+'P267J' [77Z7\2H])^_+><& !(` TZ.M+>` D70#@(1aN I#H( .b 27O38c.<R7'$ab'+>'P"+d)+(4 '(7'NTM7(+I '(+ $ 4e'8c7fHc');'+>` +$470#4]'.;48;,Nc7.g+>(1h'H])^_7O 8('$"67J'i !0"31D23.'-4% !('.<& +>f%QIj%7O7k 8,l57m+("+c'.'-4_2n J(7+04o4+>$.<& +>fj%QI+04jo4+>$.<& +>f%1 a<& K'+04j7m+_n+c'27m+.<& +>fj%+c' '(.'-4+9('HI!1:6' pHI.'-4.K'@9 7q(nr"(j1 (1!9 4'>o _!HIsN)+"#N7q(.<& +>f%2_!Q"  O7Q]'np1 81>$7c_!HV#.'-4tJ(7_tE_p1u"(t,v.<& +w Q"  O7Q]' !7m+!+c'27m+_p+c':1:6'xHI '(.'-47q(_!QInp1!9 4'>o 77 +9 '7_jx2_tHI77+9 '7b'sN)1 719 '7_:HI? ?ic'J(i T1lT'P[7)y7" 7q(?+>f%QI?+>fj%+z8,l51  !"#$% &' '(3)*+, ,-+&' '()+./% !0"1D2.'-4% (15*+ 68'-"+97 P 2 3. 2 2 3 . 2 2 2 3 . 2 2 2 3= + + + + + + − + + 81! 3 3 x 1 65 65 1= + − − 1luE@{B@B1 !0"1D23.'-4%!)<= +>?((BD%@AC@C(B%(B%E(HI+(4 JK2 "#$%1 (1!9 4'>o )<= +>?H"7O 'P4|"+}1 81L7.M( )<= +>?7O77 'P4./" "#$1 !0"D132.'-4%:';')<= +>?QIP)<= +>?J(" (1 13x 2(3x 2) x 3 42 0+ + + + = 81 2 2 x 9 y 9 y 9 x 9  + + =   + + =   1 !0"F123.'-4% (1!9 4'>o Q]'46'@2#~ 2 2 2 1 x 2y 3 xy y 1 ≤ + + + + 1 81!DJKT<= (2827Q]'(87E1?4 '+>MH]V+7q(8'-"+97 2 2 2 2 2 2 1 1 1 M a 2b 3 b 2c 3 c 2a 3 = + + + + + + + + 1 !0"3123.'-4% !+(4 '7_n!+h(4W_n1_!En!_nB_!%27O:HI+>6 +04QInt2 !xHI77.<& )0 '7+> 1!9 4'>o D.'-4t2x2:+w I 1 !0"•1D23.'-4% !+(4 '7_n!70+c'_b'sN).<& +>f+041b+.'-4tT'.b  +>$7" h_!1>$s(.K'7q(s(tnHV#.'-4xJ(7txEt!1?4+d)R) 77+>" .'-47q(.c+w nx,'tT'7"#-+>$7" h_!1 €:•t‚!ƒa„ a…†!DCF n‡ •, 7"#$% a/+'7l+97 &' '(HI48I')*+ !0"123.'-4% (15*+ 68'-"+97E 2 2 8 18+ − 81:';'P)<= +>? 2x y 9 3x 2y 10 + =   − =  !0"12.'-4%!8'-"+97_E 2 3 2x 4 1 1 1 x 1 x 1 x + − − − + − Q]'@ˆ‰@Š% (15*+ 68'-"+97_1 81?4 '+>MH]V+7q(_1 !0"D12.'-4%!)<= +>?8d7('@AC4B%@B4E%2Q]'4HI +(4JK1 (1:';')<= +>?%Q]'4E1 81?44 )<= +>?%7O(' 'P4@  2@  J( 2 2 1 2 x x 12+ = !0"F1D2.'-4% !‹(.<& +>f+04.<& ,l_n1b+.'-4!7K.M+"b7.c +w _J(7!,7_QI,71a<& +w .'r"(!QIQ"  O7Q]'_ 7m+‹(.<& +>f%+c't1>$7" ntHV#.'-4,7nQI,7t1'N) +"#N7q(‹(.<& +>f.W7+c'7m+.<& +w !t+c'x1:6'pHI '( .'-47q(_QI!t1 (1!9 4'+9 '7n!pHI+9 '7b'sN)1 81!9 4'xExp1 71:6'HI+04.<& +>f c'sN)+(4 '7pt1!9 4'8(.'-4t22n +w I 2+Œ.OJ"#>( O7_n7OJK., .•','T'7"#-+>$7" nt1 !0"3123.'-4% (1!9 4'>o )<= +>?B%@AB@CB%BD%EHI+(4JK% H"7O 'P4|"+ŽQ]'46'JK "#$1 81:';')<= +>? 3 5 1 x+ E@AB% €:•t‚!ƒa„ a…†!DCF n‡ •7"#$% a/+'7l+97 &' '(HI48I'3)*+   !0"123.'-4% !8'-"+97_E 2 1 1 x 1 ( ) : x x x 1 ( x 1) + + − − − Q]'@~‰@Š% (15*+ 68'-"+97_1 81?4 '+>MH]V+7q(8'-"+97E_C• x !0"12.'-4% !)<= +>?8d7('@AB4C%@C•E%2Q]'4HI+(4JK1 (1?477 '+>M7q(4 )<= +>?%7O 'P4@EB 2 81!9 4'>o )<= +>?%H"7O(' 'P4)08'P+@  2@  Q]'46' 41?44 8'-"+97nE 2 2 1 2 (x 9)(x 4) − − .c+ '+>MH]V+1 !0"D12.'-4% (1:';'P)<= +>? 2 2 2 x y z 6 xy yz zx 7 x y z 14 + + = + − = + + =      81?4+V+7;777g)JK+Z7@‰#%J(7@AB%@AB#A%EF@A#1 !0"F1D2.'-4%!.<& +>f+048,l57O.<& ,l_n1>$.c +w nHV#4b+.'-4,7QI,7n%1u"(,v.<& +w Q"  O7Q]'_n7m+.<& +>f+c'('.'-4QI1>$s(.K'7q(s(HV#4b+ .'-4!1_!7m+.<& +>f+c',7_2('T0#QIn7m+("Xx1 (1!9 4'>o +9 '7_xb'sN)1 81u"(,v.<& +w Q"  O7Q]'_!7m+s(+c'p1!9 4'+(4 '7 p701 71:';J‹xE!1!9 4'>o ABAHI, .•','T'7"#-+>$ .c+w n1 !0"3123.'-4% (1!@2#HI77JK+Z7+h(4W@A@AB#ACD%B#AC%AE1?4 '+>MH] V+QI '+>MhV+7q(8'-"+97!E@AB#A1 81?4+V+7;777g)JK "#$T<= (‰8%J(7 2 a 2 ab 2 − + HIJK "#$1 €:•t‚!ƒa„ †!DC F _:_: ••, 7"#$% &' '(HI48I')*+ !0"12.'-4% (%!9 4'>o  1 1 1 1 2 2 3 3 4 + + + + + E 8%:';'P)<= +>?J(" 3x 2y 5 0 2 3x 3 2y 0  + − =   − =   !0"12.'-4% !I4JK#E@A%QI#E 1 3 x 2 2 − + T% (1•.`+M7q(('I4JK+>$7k 4b+P+>‘7+6(.b1 81?4+6(.b '(.'-47q(('.`+MI4JK.W71 !0"D12.'-4%!)<= +>?@ABC#%@BFC#E’% (1?4#J(7)<= +>?’%+z“@7O4b+ 'P4,U)1 81?47g)JK@‰#%T<= +h()<= +>?’%J(7#hV+1 !0"F1F2.'-4% !+(4 '7_n!Q" 70+c'_2tHI+>" .'-47q(_!2Q•.<& +>f %.<& ,l!t7m+n!+c'x2nt7m+.<& +>f%+c'p1 (%!9 4'>o 9 '7_n!pHI+9 '7b'sN)1 8%!9 4'>o  O7_pnE O7_!nQI+(4 '7tx!701 7%UTI'_p7m+.<& +>f%+c'1!9 4'+9 '7!xtHI?Q" 1 . + 1 81!DJKT<=  (2 82 7Q]'(87E1?4 '+>MH]V+7q(8'-"+97 2 2 2 2 2 2 1 1 1 M a 2b 3 b 2c 3 c 2a 3 = + + + + + + + + 1 !0"31 23 .'-4% !+(4. +>?J(" (1 13x 2( 3x 2) x 3 42 0+ + + + = 81 2 2 x 9 y 9 y 9 x 9  + + =   + + =   1 !0"F1 23 .'-4% (1!9 4'>o Q]'46' @2 #~ 2 2 2 1 x 2y 3 xy y 1 ≤ +. '()+./% !0"1D2.'-4% (15*+ 68'-"+97 P 2 3. 2 2 3 . 2 2 2 3 . 2 2 2 3= + + + + + + − + + 81! 3 3 x 1 65 65 1= + − − 1luE@{B@B1 !0"1D23.'-4%!)<=

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