!" #$ %&'!() ! (Không k thi gian giao đ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`6N N:O*78/AaR'I:K8E;/%78':bcJ ,+,3$ -%+'0OJ:J $A1/'d'K8E7*@'.eOf%HOg ./.F'$P;/%78'I:J*78/O/R+A(C78 *78/*@;/%78'V,'C%"V,''HI:Ic -%4'h%i/+5 :0A A,O5/ /)>?N N(A AE'%F3j'H*78/OA,W''')*EA *+5, /0123 E8')^/'CA*Ek5+R78'H$ Og''/@R'9bAaR 'E'`/%78'3$ OC7g'Ogk5 RAS R''') >?'k5OgS R'' >lIA AE'%F'G?'m2'H8')^/'CEA AE'%F'G?'')/9'(V'(?Og'G?'m2Of;%78':1E%C'?'A *+6,4./0123 8')^/'CL'('G?'m23 J $ A3:L'.eOg78./ .F'$Of%H: /+'G'9/%78'C*78/'((n$O:bcK8 ')*!6/R'H^/'C%C'?'AE'%F'G?'')/9'(V'('HL-+G '=O1+*V'G?'R'.*'''H0 nnnnnnnnnnnnnnnnnnnnnn78nnnnnnnnnnnnnnnnnnnnnn (Đ thi ny c 01 trang) 3:$c::3:I:3/c:MNc:P:Lb:#I:[cA DO@, AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA \FAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\FAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA "-"4949" %&'() !" *+", /0123 A\D !MN $ A3(''7C*;>?>*A TN1MN $ _-cn0 #$ %U → MN -#$ 0 I _-In0#$ ↑ _-cn0 $-0 TN2MN $ _3$ → MN_3$ -0 MN_c #$ %U → MN -#$ 0 I _I#$ ↑ _c $-I0 AB;*+G'::B'H)+o')'eV@%V%C>', +G)%,SX/'H'c_c-0?' R'HMN $ -0A N7C*;>?-0'( #$ I − = -0A N7C*;>?-0:-I0'( #$ I = -0A N*78#$ /%78'f>?-I0)<=f>?-0 I I <A − = IbnJJ J I = = BpI: !MN I $ A *+, /0123 q'LO./.F'3/#$ ;'(''7C*;>?>*=78 P_3/#$ → P#$ _3/ ↓ -0MN_3/#$ → MN#$ _3/ ↓ -0 3)*!Q63/:'(VMN.7:P.7AT/.F'36MN#$ :P#$ :'(V'(3/#$ .7A @$O./.F'3;'(''>?$_MN#$ → MN-$0 ↓ _ #$ -I0 $_3/#$ → 3/-$0 ↓ _ #$ -0$_P#$ → P-$0 ↓ _ #$ -0 /+1H+G+,;'(''>?MN-$0 _$ → MN $ I _ $-c0 3/-$0 → 3/$_ $-b0P-$0 → P$_ $-J0 :;<=>?@A"B02CDE0?78.+ 4 F;G \D RMN:P=78:-0'(c_I:J-0 3)*!Q'`'(3/cA-_0:J-0 \>57C*;%78':-0O:-0 qR78K8/%78' /''>?-c0:-b0:-J0 I 3/$ P$ MN $ 3/$ 3/$ : A: cA I:c : = + + = + + = + > -90 :;<=>?@AB02CDE0F;.+ 4 ?78G,không xy ra cc phn ng (4), (7)3 \D RP#$ OMN#$ 9f>?-0:-0=78:-0 N>?-I0:-0:-c0:-J0+R78')*!T/%78' T I P$ MN $ + _J:-0 N7C*;>?-0:-0+R78+9@ -cn0_-cnc0_J:nI:J:<c-0 \>57C*;%78':-0A "GN>?-0-0'(S R3/#$ 3/#$ :_::-0 Bp 3/#$ P : 3 :-P0 : = = GN>?-0-0'(S R3/9*:_::-0 Bp 3/ :Ac:c-0Op+R78+9.7:n:c:cJ-0+9 .7>MN.7O;>?-0>* /]'1%Y>*'(:MN> ?ABp+R78+9>?I:Jn:cJ:c-0A qR78MN%=/:cJ_:Ac:J-0 MN :J W AW J:IbW I:J = = W P WnJ:IbW:cIWA 0HDI0J=Nguyn Vân Lưng trưng THCS năng khiu Nguyn Cao - Qu V - B!c Ninh "-"4949" -G3)*!Q9*'(:IMNO:3/A3'>?>* MN_c #$ %U → MN -#$ 0 I _I#$ ↑ _c $-<0 -0:I: 3/_ #$ %U → 3/#$ _#$ ↑ _ $-0 -0:: V,'#$ -%+'0/%78'-:_:0A::<-,0 *+-, /0123 "GN*E'(JW+R78+9A\DEP $ '(W P P AW P c+ JWPI B;(*F'H+9P@*F./)h8:PcBpE3/$A 3'7C*;>?>* 3/$_ → 3/_ $-0 3/$_$ I → 3/-$ I 0 _ $-0 I3/_J$ I → I3/-$ I 0 _$ ↑ _ $-I0 B;/R *3/-$ I 0 @/R/%78''(V3/-$ I 0 A $ N7C*;>?-0:-0:-I0;4>?-03/$.71;'/R'h%i/9 /R3/-$ I 0 @'( I 3/-$ 0 3/$ -0 J = = Bp+R78/R[ I 3/-$ 0 A $ A-JJ J0 I:A -0 J = + = I/R[3/-$ I 0 AI $ GN7C*;>?-0+R78')*!>%',+R78$%YF ) %f3/$-)+V>?%('(5/ /)71:').70ABp $ n-0 3dN7C*;>?-0 R3/9*" R$%YF )%?''( 3/ $ c − -0AN>?-I0; $ 3/ A A -0 I I c − − = = BpV,'$/%78'4%+'B $ :A- 0 :<IIA- 0 -0 − = − *+4, /0123 3'7C*;>?>* 3 3$$_3 _ $ #$ .' b 3 → 3 3$$3 _ _ $-0 K8E'.eOg $ :A:-0:'`'(ON N>? 3 3$$ .7 _$ → 3 3$$_ $-0 3 3$$3 _ _$ → 3 3$$_3 _ $-I0 N''>?-0:-0:-I0; /X/*;1%S%=/%i/1/R *78/%=/%i/1*78/ />?Og /R : *78/. *78/ /? A q(CI:J*78/;/%78'V,'C%"V,''HI:Ic 4'h %i/+5@'( R'H'"/ABp *78/ I:Ic :-0 J = = qR78'H*78/ *78/ I:J I : = _JI%(3 I $A N''>?-0:-0:-I0; $ % /R :-0A \D RN N9*>?-0-0A;N>?-I0 R$: 3 3$$:3 _ $%i/-0A#R*78/.7 />?-0:n-0Ar> ? -0 R$:n-0 @4> ?-0'( R$:3 3$$: 3 3$$%i/:n-0A 0HDI0J=Nguyn Vân Lưng trưng THCS năng khiu Nguyn Cao - Qu V - B!c Ninh I "-"4949" Bp*I:K8E'('?:n-03 I $.7::n-03 3$$.7: 3 3$$3 I A q%R'I:E' 3$ :bcJ :b -0 : = = : $ J:J :c -0 J = = E IA-:n0_-:n0A-__0_A-__<0I:-0 I:JnI_:J_:_c:bnnn___<I: 1,8x +0,15y -18a = 2,61,3 s.e%F/p>/@R+%R';393$ :9 $@'( 3$ 3 A-: 0 - 0A-: 0 - 0A :b -0= = − + + − + + = :n_:n_:n__:b ::Ix = 2. $ I A-: 0 A-: 0 A :c -0 + + = = − + − + = :n_:b_:bn:n:_:_::c 0,075 y -a = 0,145,3 O-t0'(57C*; : J :<< :b : − = − − = I :J = = Bp3j'H3 I 3$$:333 3n3$$A *I:K8E'('? :3 I $::b3 I 3$$O:J 3 I 3$$3 I A j>?N N(3 I 3$$_3 I $ #$ .' b 3 → 3 I 3$$3 I _ $ -%=/0:: ->?0:J:J - />?0:b::J:J 1/5/ /)>?W;3 I $1@,5/ /)N')A "G5/ /)>?N N(W :J AW cc:cbW : = #R/R3 I 3$$" R3 I 3$$%=/@(:-0 I 3 3$$ :A< :-0= = G3G?'m2'H*78/3 I $:'H3 I $A *E'? I 3 $ :AI :J -0= = I 3 $ :J W AW <:c<bW I: = = I 3 3$$ :bAb : -0= = I 3 3$$ : AW IJ:JW I: = = B I I 3 3$$3 W = Wn-<:c<bW_IJ:JW0:WA *+5, /0123 "GB;+%R'')^/'CE'`/%78'3$ : $Nk5@* E'`'?3::$Og R/@2)%G R/@23A a&3j'HE3 $ O;*+G::B'H)+o')'eV@%V%C >+G)%,SX/'Hp' E -0;'(>?'A 3 $ _- I − 0$ → 3$ _ $-0 -0 I − N*'(k5-_ I − 0Ic_c_ *E9'( $ - 3 _ 0Ib Bp3j'HE3 J $ A 0HDI0J=Nguyn Vân Lưng trưng THCS năng khiu Nguyn Cao - Qu V - B!c Ninh "-"4949" GE'(3j3 J $ 9%C'?'@(&'N N('(''33 3 I n3 n3 n3$$u-3 I 0 3n3$$u n3$$n3 n3 n3 I un3$$n3-3 I 0 u 3 I n3$$n3 n3 I u3 I n3 n3$$n3 I A *+6,4./0123 B;L>?Og+i9*78/O/R@LN NA T*78/'(I(n$L9'(/@2$@L+GVvw-3$$ v 0 I O;' L'(c$O;OpL>vw-$0-$$3 v 0 *%(vwR'.*'''H*78/: v R' .*''*/;'HA j7C*;>?>* vw-$0-$$3 v 0 _$ → vw-$0 I _ v 3$$-0 #R/R9*>"/O;R'vw @+1OgKR'R'A qR78*/;'H/R :bc P JJ : = = v _cbJJ v A Bp*/R'(R''(vx%(n3 I n :;<=>?@A"K88:D=>?L02+M08ED:LCNL R'H3$$:-0 P/R'9v3$$'d'( R:-0A qR78*/;'H/R cJA: -v cb0A: P JJ : + + = = v-R'3 3n3 n3 I n33n0 3G?''HL'(.9vw-$0-$$30-$$33 I 0 TL3 J $ @vw3 I ?'*78/3 I -$0 I A 3'33'(V'('HL 3 -$0n3-$$30n3 -$$33 I 0u3 -$$30n3-$0n3 -$$33 I 0u 3 -$$30n3-$$33 I 0n3 -$0u :;<=>?@AK88:D=>?L02+M08ED:LCN - L R'H3 I 3$$:-0 P/R'9v3$$'d'( R:-0A qR78*/;'H/R JA: -v cb0A: P JJ : + + = = vb-R'3 3n0 3G?''HL'(.9vw-$0-$$33 I 0-$$33 I 0 TL3 J $ @vw3 I ?'*78/3 I -$0 I A 3'33'(V'('HL 3 -$0n3-$$33 I 0n3 -$$33 I 0u3 -$$33 I 0n3-$0n3 -$$33 I 0u 3 -$$33 I 0n3-$$33 I 0n3 -$0u nnnnnnnnnn 0HDI0J=Nguyn Vân Lưng trưng THCS năng khiu Nguyn Cao - Qu V - B!c Ninh . = W P WnJ:IbW:cIWA 0HDI0J=Nguyn Vân Lưng trưng THCS năng khiu Nguyn Cao - Qu V - B!c Ninh "-" 494 9" -G3)*!Q 9 *'(:IMNO:3/A3'>?>* MN_c #$ %U → MN -#$ 0 I _I#$ ↑ _c $-<0 -0:I: 3/_ #$ %U → 3/#$ _#$ ↑ _ $-0 -0:: V,'#$ -%+'0/%78'-:_:0A::<-,0 *+-,. = GN>?-0-0'(S R3/ 9 *:_::-0 Bp 3/ :Ac:c-0Op+R78+ 9 .7:n:c:cJ-0+ 9 .7>MN.7O;>?-0>*. R$:3 3$$: 3 3$$%i/:n-0A 0HDI0J=Nguyn Vân Lưng trưng THCS năng khiu Nguyn Cao - Qu V - B!c Ninh I "-" 494 9" Bp*I:K8E'('?:n-03 I $.7::n-03 3$$.7: 3 3$$3 I A q%R'I:E' 3$ :bcJ