Đáp Án môn toán TP.HCM 2013-2014

    !"#$%#& %%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%% ĐP N '() *+TON Câu 1+Gii PT v H phương trnh. ,- . # %/.012 ∆ 23 # %&,"24⇒ ∆ 25"6 ,*(7 *89 :(3*8).  2$;. # 2# 3- . # %#.%2+ ∆ <23< # %,"2=%- # %=%-2#⇒ > #∆ = "6 ,*(7 *89 :(3*8) 5#  #x = ±  "- . & 0$. # %&2=- ?). # 2)=) ≥ -5@ABC,. & 2) #  ,B)5) # DEF=-),"6+ ) # 0$) # %&2 ,030"20$0=%&-2⇒)  25) # 2%&=GFH*- )  2⇒. # 2⇒.2 ±  I- # $ & # 1 / /  #  #  #   x y x y x x x y x y x y y − = − = = =     ⇔ ⇔ ⇔     + = − + = − + = − = −      Câu 2: (1.5đ): ,-JKL) M+ . %# %   # B2. # &    & 3-N)FHKO7*,FK*P+ QR) FE( KO7*,FK*P=-DE=I-+ . # 2%.0#⇔. # 0.%#2⇔  # x x =   = −  ⋅ .2⇒B25FHKOK*P) S( T)=;- ⋅ .2%#⇒B2&5FHKOK*P) S( T)=;- Câu 3+ $ $ $ $ U $  U U $ $ = $-= $- $ x x x x x x A x x x x x x x   + − + + + = + × = × =  ÷  ÷ + + + − + − −    .  # B2%.0# #  # # # # & # $ 1 # / & # $ 1 # / # 1 / / # # $  /  $  /  # 1 / / # # $ / / / / /=& /- / / # B     + + − − + +  ÷  ÷ = − −  ÷  ÷         + + − − + + = − −  ÷  ÷  ÷  ÷       + = − = + − =  ÷  ÷   60  Câu 4+" F+V. # %V.0 # 02=W- ,- "6(7 *8.2X#(Y(+V # #   V     & # m m m− + + = ⇔ = ⇔ = ± ZBD[* m = ± ) N=W-"6 (7 *8.2X# 3- >∆ = 3< # %,"21%V= # 0-2V%V # 2V=% # - P=W-"6 ,*(7 *8) N >∆ = V=% # -≥⇔%≤≤ ,*(7 *8) F\](+.  & %. # & 2.  $ %. # $ ⇔=.  %. # -=.  0. #-= .  # 0. # # -2=.  %. # -=.  # 0. # # 0.  . # - ⇔=.  %. # -=.  0. # -^=.  0. # - # %#.  . # -_2=.  %. # -^=.  0 # %.  . # -_=WW- TH1+`A=W-"6(7 *8aR9(7 *8.  2. # @ABC,+.  %. # 2(Y(=WW-) F\](a *K6 >∆ = V=%  # -2⇔ m = ±  TH2+`A=W-"6 ,*(7 *899 :(3*8)+=WW-⇔=.  0. # -^=.  0. # - # %#.  . # -_2=.  0 # %.  . # =WWW-  bF 8) S"*%c)),"6+  # #  #    V x x m x x + =    + =     ,BDEF=WWW-),"6+%# #  V m + 2% #  V m + ⇔ #  V m + 2'(7 *8 ZBD[* m = ± ) N=W-"6 ,*(7 *8) F\.  & %. # & 2.  $ %. # $  Câu 5: a) · · MBC BAC= =d(7" e( » BC - · · MIC BAC= =Kf(7DM- ⇒ · · MBC MIC= ⇒,*Kg( h5( N(KFH(Ii[*O)76"a '(7Kj* ⇒hGE)S7*k"(O*)*`9 b) QR)∆lDE∆lh),"6+ · · IFC BAC= =KK- · · ICF FMB= ="d(7" e("A(7 º BI - ⇒∆l∆lh=77- ⇒ FI FC FB FM = ⇒ll2llh=- QR)∆lhDE∆lc),"6+ · · DFB CFE= =KK- · · DBF CEF= ="d(7" e("A(7 » DC - ⇒∆lh∆lc=77- ⇒ FD FB FC FE = ⇒llh2llc=#- m=-DE=#-@ABC,+ll2llc c) QR)∆lnDE∆lh),"6+ · · QFC TFB= =KK- · · FBT FQC= ="d(7" e("A(7 » DC - ⇒∆ln∆lh=77- ⇒ FQ FC FB FT = ⇒lnl2llh5Ell2llh=")-⇒lnl2ll⇒ FQ FI FM FT = QR)∆lnDE∆l),"6+ FQ FI FM FT = E · · IFQ TFM= =KK- ⇒∆ln∆l="7"- ⇒ · · FIQ FTM= = ,*76")io(7S(7- E · FIQ = U  ⇒ · FTM 2U   ,GH*"6 · FTP 2U  ⇒ · · · PTM FTM FTP= + 2U  0U  2V  ⇒ · PTM GE76"3p),B3,K*Pl55 q(7 E(7 "- !* GEa F\(7"k" )mK`(h  # IBC S BC h ∆ = × × 5E) AO" » BC "r,Kis(7)CL(Kis(7at(  5h"uKM( P IBC S ∆ G[(( T)) N G[(( T)E G[(( T)a * ≡ a *K6vGEKis(7at(  "r,=-5 ,BvKu*.S(7D[*wA,ZBa *vKu*.S(7D[*wA,) N IBC S ∆ G[(( T) hE*7*\*" i,aM9K!"GH*(`A"67N@o@AT)F(7Kix"769y AI*( IA"z7,*G"F . ,*76")io(7S(7- E · FIQ = U  ⇒ · FTM 2U   ,GH*"6 · FTP 2U  ⇒ · · · PTM FTM FTP= + 2U  0U  2V  ⇒ · PTM GE76"3p),B3,K*Pl55 q(7 E(7 "-