Đề thi tuyển sinh lớp 10 THPT tỉnh Tây Ninh năm học 2012 - 2013 môn Toán

     ! " #$%&'()Không chuyên*  +    ,&-%(k hông kể thời gian giao đề) ./1điểm   ./ 1 điểm ! ./"1 điểm ! ./0 1 điểm "#$#%&'%( )   ./1 1 điểm*+",-.'/ ./2 1 điểm01 !     "#       ( ! 23 .  "413 -56. #%&! ./+ 1 điểm "#",-'/7 8%9"#(%":;<! ./3 1 điểm01=>0?%@9= ("1=A!01B3!A4 ":C "1=A! ./41 điểm01=>0?%@9=!D"E"F=>7>09G!H%=G 6:"#I!/>I?F1C7=09J!0&&0GIJ:&:B! ./1 điểmH"EKC:CL %=>(M%CF@"N"F! O"-?-."#PH%Q'11% ?=P>(-Q6! = R! S= > T U RV= + R R S Vx x− − = R U T WV x y x y − =   + =  x R W Xx − R < x− R y x= ( ) R R R  W  T Vx x− + + + = W x R x W R W R = x x x x= + + T  Wy x= + − => T = =0 < = » => YZ[\ 56 ./1điểm!  ! ./ 1 điểm ! ! 3! 3! *]! ./"1 điểm ! ! *]  "41(C%6 ! ./0 1 điểm "#$#%&'%() ()  ! ()! ./1 1 điểm*+",-.'/! > V W R < W V W < ./2 1 điểm !       "#       ( ! ! ^ ( !  -56.#%&! _M%F! `1*a(b! ! Floi? F@5"M%F! PcF ?  ! = R! S Wd <= = = > T U RV T U R U U U= + = + = R R S Vx x− − = ( ) ( ) R e W W! S X V∆ = − − − = > e X T∆ = = W W T <x = + = R W T Rx = − = − { } f g <b R − R U U WU T T T WV T WV X WV W x y x x x x y x y y y − = = = =     ⇔ ⇔ ⇔     + = + = + = =     ( ) TbW x R W Xx − R X Vx⇔ − ≠ R Xx⇔ ≠ Tx ⇔ ≠ ± R < x− R < Vx⇔ − ≥ R <x⇔ ≤ R Rx ⇔ − ≤ ≤ R y x= x R− W− R y x= ( ) R R R  W  T Vx x− + + + = ( ) ( ) R R R R e  W W!  T  R W  T R R∆ = + − + = + + − − = − e V ⇔ ∆ ≥ R R V ⇔ − ≥  W ⇔ ≥ W R W R = x x x x= + +  W≥ W R R Rx x+ = + R W R  Tx x = + ( ) R R R W R W R = R R  T  R U  W < <x x x x= + + = + + + = + + = + + ≥ ⇒  = <=  W V + =  W ⇔ = −  W≥ ( ) ( ) R R =  W < W W <= + + ≥ + +  W≥ = S ⇒ ≥ F! Kt lunh ="9-56 ?! 78& _M%F! `1*a(b! ! * H *]F! ./+ 1 điểm _,-'/78%9"#( %":;<! ! *]-i ! ./3 1 điểm ( ! ! 78&   ! ! ./41 điểm  33D7>0 9G33>I7 =09J! hj 0GIJ:&:B ( (("k1"E! PcF(:B!  &   0GIJ : B "l ( 1;("/1! ./1 điểm  3  CL  => F@  "N3  3 %Q! hj  ?-PH%Q=>"#%? =P>(-Q6! ⇒  = S=  W=  W=  = S=  W≥ W R R Rx x+ = + R W R  Tx x = + R R W R W R = R R  T  R Ux x x x= + + = + + + = + +  W≥ R R =  R U W R!W U= + + ≥ + + = S ≥  = S=  W= T  Wy x= + −  W < ⇔ − =  U ⇔ =  U = ( ) R R R R >0 => =0 T < U = + = + = =A!>0 =>!=0 = ( ) =>!=0 T!< =A R3<  >0 U ⇒ = = = R R R W W W =A => =0 = + R R R R R R R R R R R R => !=0 T !< T !< =A => =0 T < U ⇒ = = = + + ( ) T!< =A R3<  U ⇒ = = =>0 ∆ µ V = XV= => Kb R    ÷   » I =G∈ µ ¼ ¼ ( ) ¼ ¼ ( ) » W W W 0 '"=> '"=IG '"=G> '"=IG '">G R R R = − = − = µ 0 · » W >IG '">G R = · >IG · µ » W >IG 0 '">G R = = ⇒ ( ) K => Rm< » P =>∈ 2^%?!(! G1=>F@"NH! G1CL=>F@"NHF@"N! _cF@"N! H"/.P=6"#0'1 1! L9P(19"kL F@"N! _#0 "19=> /"-CQ:(F@ "N;! 0%:%&(CH"19=> /"-! ? ! =0"F.% &((H! C1LnP! P"#o.% Q! *]FP"#o. %Q %?(-Q6! P=>∆ ^ g P= p P> p => q ^ ⇔ ( ) q P= p P> ¼ => ¼ '"=> α = P> g P0 P>0 ⇒ ∆ µ µ W W P R0⇒ = P>0 ∆ µ µ ¼ ¼ W W W W W W W 0 P '"=> '"=> R R R < < α ⇒ = = × = = W < α ⇒ W < α P= p P> g P= p P0 g =0 P> g P0 ⇒ ( ) q P= p P> q =0⇔ ⇔ · V =>0 XV⇒ = µ µ µ µ V W R V W W > > XV 0 = XV  + =  ⇒  + =   µ µ W R = >⇒ = µ µ W W > 0= =P> ⇒ ∆ P= g P> ⇒ ¼ ¼ P= P>⇒ = ⇒ » => » => P=>∆ . %=>(M%CF@"N"F! O" ;-  ?- ."#PH%Q'11% ?=P>( - Q6! = R! S= > T U RV= + R R S Vx x− − = R. điểm*+", - .'/ ./2 1 điểm01 !     "#       ( ! 23 .  "413  - 56. #%&! ./+. " #$%&'()Không chuyên*  +    ,& ;-% (k hông kể thời gian giao đề) ./1điểm   ./ 1 điểm