!"#$%& I. Trc nghim: *Khoanh trũn vo mt ch cỏi trc cõu tr li ỳng. '( ))*+ (,-!./*+ (,"*+ (,$0)1#234 5 2 3 0 x - = 6 1 x 2 0 2 - + = x y 0+ = 7 0x 1 0+ = 89(:);! x 4= - " <#);!*+ (, 5 2,5x 10- = 6 2,5x 10- = - 3x 8 0- = 7 3x 1 x 7- = + =0 <#);!*+ (, ( ) 1 x x 2 0 3 ổ ử ữ ỗ ữ + - = ỗ ữ ỗ ữ ỗ ố ứ " 5 1 3 ỡ ỹ ù ù ù ù - ớ ý ù ù ù ù ợ ỵ 6 { } 2 1 ; 2 3 ỡ ỹ ù ù ù ù - - ớ ý ù ù ù ù ợ ỵ 7 1 ;2 3 ỡ ỹ ù ù ù ù - ớ ý ù ù ù ù ợ ỵ >?.@<A)B:);!*+ (, x x 1 0 2x 1 3 x + + = + + " 5 1 x 2 ạ - C) x 3ạ - 6 1 x 2 ạ - 1 x 2 ạ - x 3ạ - 7 x 3ạ - DEF. (:);!$G.H)IJ>A"-KL*+ ,!)M 5AN= 6AO= 7 x 4 < 7 7 x 4 > P,Q$G.LR0 <#);!$1*+ , 5 x 1 7+ Ê 6 x 1 8+ Ê x 1 7+ 7 x 1 8+ IEF. x yÊ !N&, 5 ax ayÊ 6 ax ay= ax ay> 7 ax ay ST$FBU-!.BVW"BX 4 5 0,7x 2,1 x 0,3> - > - 6 0,7x 2,1 x 3> - < - 0,7x 2,1 x 3> - > 7 0,7x 2,1 x 3> - > - %61*+ (,L*BVW"$1*+ (,$0)1#234 5 1 0 2x 1 > + 6 0.x 5 0+ > 2 2x 3 0> 7 1 x 2 0 2 + < '&YAO&/@FZ.[(X );!$G.H) x 2x 5- - + " 5AJD 6JAJD J=A\D 7JA\D '',$,567)M67"B* )T E"]"*^"(. BG#);!)))_5657`,Qa b-KL<c));!!# )5E L<c),$,567" 5 1 2 6 1 4 1 8 7 1 16 '8!# )56/5"V )`,Qa G# 2LB_d 6$e  5'/I 68/ =/ 7D/' P6F AB 3 CD 7 = 7f8')#2L);!56" 5P)# 6I)# %)# 7'&)# '>EK#ghi)25#2hi)2$)2BGB*^)#2@d B:BX  5 6  !a7<c)A. Z.!);!,)M B?.$e ').BWV)?.)! $aGc));!,"j (kBH $e 8c));!l!).BW(. B_ =L<c)BWV)?.)! 'D,"j (kBH @c)*)*,Q 7<c)A. Z.!);!,BM" 5 2 72cm  6 2 60cm  2 40cm 7 2 36cm II. Tự luận: 'P9[$1*+ (, 1,5 x 4x 5 5 2 - + ³ $G.LR0 <#,#B*^)((k)-K 'I2)!A.Lm n$F5BF$F6#1D  *^)Lm n$F6?$F5#1P  c@[ )) o!!$F56/$F(e 0K));!Lm *)"8@# '8! 567`567a)M 1 AB AD CD 2 = = 9"(. BG#);!79 " !BG#);!567 !aH #(e H )56E", $aH #76 ^ 6 )aH # ADHV Bp L_  CDBV  La6F56f8/D)#q67f>)#cB2L)_6L<c),! 567 Đáp án: (r) <#`>Ba g)V.(["BX B*^)&/8DBG# '6 85 =7 > D P6 I7 7 %7 '&7 '' '87 '= '> b 3® 'D6 s".0`PBa 'P !a,#B*^) a 1£ - $a6G.LRBX  &/IDBG# &/IDBG# 'I tBCB?.@<90K))!`F.0K)Lm *) dn v 0= a"A`B?.@<AO8a t0B*^)*+ (,uB?.@<$  ( ) ( ) 5 x 2 6 x 2+ = - x 22Þ = `[#vB?.@<a tcZ.v B* @F".0uB?.@< AB 120km= &/DBG# 'BG# &/DBG# ' YQ,BX  !H #B*^)H )56E", $H #B*^)76.  M)6 )H #B*^) ADH CDBV : V  Lc BC 3cm.= &/DBG# &/DBG# &/DBG# &/DBG# &/DBG# 7<c),! ( ) 2 ABCD S 6 2 5 cm= + (r) <#@)Z.! w!(m#2)o)(*))V.(["BX `>Ba '0 <#);!*+ (, ( ) 3 x x 1 0 2 ổ ử ữ ỗ ữ - + = ỗ ữ ỗ ữ ỗ ố ứ " 5 3 2 ỡ ỹ ù ù ù ù ớ ý ù ù ù ù ợ ỵ 6 { } 1- 3 ; 1 2 ỡ ỹ ù ù ù ù - ớ ý ù ù ù ù ợ ỵ 7 3 ;1 2 ỡ ỹ ù ù ù ù ớ ý ù ù ù ù ợ ỵ 8*+ (, ( ) 2 m 5m 4 x m 1+ + = + ( BMA"3/#"#2-K)(*)vWK #ghi)25#2hi)26)2BGB*^)#2#<B?BX A B C !#f& ',*+ (, <# !\ $#ft' 8,*+ (, <#BX # (:);!A $\ =,*+ (,0 1 x 4 = " <# =?.@<A)B:);!*+ (, 5x 1 x 3 0 4x 2 1 x + - + = - + " 5 1 x 2 ạ 6 x 1ạ - 1 x 2 ạ x 1ạ - 1 x 2 ạ - 7 x 1ạ - >61*+ (,-!.BVW"$1*+ (,$0)1#234 5 2 2x 1 0+ < 6 x 3 0 3x 2006 + > + 0.x 4 0+ > 7 1 x 1 0 4 - < DYANW!)M 5 x 5 y 5- > - 6 5 2x 5 2y- < - 2x 5 2y 5- < - 7 5 x 5 y- < - P<B?L*LVW"BX 4 5xK!"-KV#F.=!ND! 6xK!"-KL*+ F.=!OD! xK!"-KL*+ F.D!N=! 7xK!"-KV#F.D!N=! I,QL*BVW$G.LRBX 0 <#);!$1*+ (,=AJ>Nt' 5 6 7 9(:Af'" <#);!$1*+ (, 5=A\=O% 6tDAO>A\' AJ8ANt8A\> 7AJPODJA %AN&/@FZ.[(X );!$G.H) 2x x 5- - + " 5t=A\D 6A\D JA\D 7=A\D '&6F MN 2 PQ 5 =  MN 2cm= 2LB_Sy$e  5D)# 6 10 5 )#  10 )# 78)# ''( ,Q/$FzEEz/Ef>)#/ {zf'8)#/zEzf)#xKB);!B_d {" 5P)# 6)# '&)# 7D)# '8(,Q)ME6e H)BX " 5 MN AM BC AN = 6 MN AM BC AB =  BC AM MN AN = 7 AM AN AB BC = '=,2)o0)M 5P#C/PBb/'8)_ 6PBb/#C/'8)_ P#C/)_/'8Bb 7P#C/Bb/'8)_ '>,"0*+ )M)_$e =)#`bQa 7<c)A. Z.!);!,"0*+ BM" 5 2 9cm 6 2 27cm  2 36cm 7 2 54cm  'D( ,Q/Gc));!,2)o0" 5 3 54cm 6 2 54cm  2 30cm 7 3 30cm  s".0 'P2 *BAu#Wnb5BFb60K)LsB:">&@#x!.@BB*^)'  0K)1W/ *BM b'DXFk)BGBF6@: !BvB:/ *BM[ j 0K)#D@#cZ.v B* nb5BFb6 'I$1*+ (, 2x 2 x 2 2 3 2 + - ³ + !a9[$1*+ (,( $a6G.LR0 <#((k)-K ',$,567/"(. BG#);!)_7G#9"( !#);!!# ) 57G#E.2))_57-!)E956 !acb-K DM NG 4 $aH # DGMV Bp L_  BGAV ,#b-KBp L_  ĐÁP ÁN . )5E L<c),$,567" 5 1 2 6 1 4 1 8 7 1 16 &apos ;8! # )56/5"V )`,Qa G# 2LB_d 6$e  5'/I 6 8/  =/ 7D/' P6F AB 3 CD 7 = 7f 8& apos;)#2L);!56" 5P)#. BC = '=,2)o0)M 5P#C/PBb/&apos ;8 )_ 6PBb/#C/&apos ;8 )_ P#C/)_/&apos ;8 Bb 7P#C/Bb/&apos ;8 )_ '>,"0*+ )M)_$e.  10 )# 7 8) # ''( ,Q/$FzEEz/Ef>)#/ {zf&apos ;8) #/zEzf)#xKB);!B_d {" 5P)# 6)# '&)# 7D)# &apos ;8 (,Q)ME6e