    !"#$%& Thời gian làm bài:150 phút, không kể thời gian phát đề '()*+, /0%123 45 &-3,0 điểm3'        y x x= − +   !!"#$%&'(#)&*  +&&,-%&'((m#./01,-+   2 3x x m− + = &4,5&/65* 45-3,0 điểm3'  7/01,-+    8, 8,  3x x− + =  99&/6 ( )    3 I x x dx= − ∫ *   ( )   f x x x= − + *7:/01,-+ ( ) ; 3f x ≤ 456-1,0 điểm3'+&4/S.ABCD&4#<ABCD 8+!=>,&?a@&? SA!=>,,4& !AB/C,#<@,4&,D(B/C,ESBD!B/C,#<F,23 3 *9.9&G&4/ S.ABCDHa* '(78(9-3,0 điểm3 Th sinh ch đưc lm mt trong hai phn (phn 1 hoc phn 2). '$:;<$=>"?#@A"$$5B" 45C'D-2,0 điểm3' -,G>,,(!A5I(#J Oxyz@&#. AEK3K3@ BE3KK3!  CE3K3K*  L/01,-+B/C,#M=(N!!=>,,4&!A#0O,C,P*  +I(#J6B&Q=,?/RS5OABC* 45E'D-1,0 điểm3'/R&T  UV!T  UW*X&#%/Q&!/Q&'( /R&T  WT  * '$:;<$=>"?#@A"$4"?<D; 45C'F-2,0 điểm3'-,G>,,(!A5I(#JOxyz@&#0O,C,∆&4/01,-+      x y z+ − = = − * 1) 9G,&&Y#.O##0O,C,∆. 2) L/01,-+B/C,&R(#.O!#0O,C,∆. 45E'F-1,0 điểm3'(/R&T  UVi!T  UWi*X&#%/Q&!/Q&'( /R&T  *T  * GGGGGGGGH#GGGGGGGG Th sinh không đưc sử dụng ti liệu. Giám thị coi thi không giải thch gì thêm. I! 9Z[[[[[[[[[[[ DG9&'(,%Z[[[[[[[[[** \S(Z[[[[[[[[[[[[[* DG9&'(,%Z[[[[[[[[[* IJK* L  & '()*+, /0%123 45 &-3,0 điểm3' XZ]U^*          8 8   8 8      x x x x y x x v y x x →−∞ →−∞ →+∞ →+∞     = − + = −∞ = − + = +∞  ÷  ÷     _ \ Z  ( )  3   ;  ; 3  3    x x y x x y x x =  = − → = ⇔ − = ⇔  =  _ #$,- G, ( ) ( ) K3 K−∞ +∞ U !,%&- G,E3K _ .&&#?E3K*.&&.=E*_* _ PPZ _ $%Z ` <a < −∞ 3  +∞ 3 3V _  _ −∞ +∞  ( )       2 3 b      m x x m x x− + = ⇔ − = − + ./01,-+b&4,5&/65+#$+   m y = − /&c#$%E ?#./65     3 3   m m m− < − < → − < − < → < < 45-3,0 điểm3' GZ`d3 B  8,t x=   WeVU3     8,    f 8,   x t x x x t    = = =   → → →    =  = =    { } KfS = (&4Z ( ) ( ) ( )       3 3         3 3               3 I x x dx x x x dx x x x x x x dx = − = − +   = − + = − + = − + =  ÷   ∫ ∫ ∫ (&4Z { }        ;E    3  ;E  3  3      3  gK   x f x x x x f x x x x x x x x S x = − + >  ⇒ ≤ ⇔ − ≤ ⇔ ≥ + ⇔  ≥ + +  >  ⇔ ⇔ ≥ ⇒ = +∞  ≥  456-1,0 điểm3'  (&4Z *    S ABCD ABCD V Bh B S a h SA  =    = =   =    W hZ ( ) 3 E KE  23SBD ABCD SOA= =R R Xi(,&!=>,SAO@(&4Z 3 3     2 ( 23 *( 23 *      2 2 * *   2 a a a SA AO a a V a = = = = ⇒ = = '(78(9-3,0 điểm3 '$:;<$=>"?#@A"$$5B" 45C'D-2,0 điểm3'  ( ) 3K K *BC = − uuur hB/C,&Q8j/&4/01,-+Z 3E  E 3 E 3 3   3x y z y z− − − + − = ⇔ − = &*7I#.I(a; b; c)8#.&Q+@(&4Z                         E  E      E  E    2 k 2 k 3 E  IA IB a b c a b c a b IB IC a b c a b c b c c IC IO a b c a b c   = − + + = + − + − + = − +     = ⇔ + − + = + + − ⇔ − + = − +       − + = = + + − = + +          a b c  =   ⇔ = ⇒    =  Lj<Z   KK   I    ÷   &*(Sl:</01,-+B/C,-=,-&&'(Z VOA8 ( )  Z  x α = VOB8 E Z y β = VOC8 ( )    E  Z E  E  KK    z I γ α β γ   = ⇒ = ∩ ∩ =  ÷   45E'D-1,0 điểm3' ( ) ( )            2  fz z i i i i i− = + − − = + − + = − + mQ&U_!/QUf '$:;<$=>"?#@A"$4"?<D; 45C'F-2,0 điểm3'   ( ) ( ) ( ) ( ) ( ) ( )      3K K 3K K K K K K *        M OM u u OM u d O A u ∆ ∆ ∆ ∆   − ∈∆ = −   ⇒   = − = −       + +   ⇒ → = = = + − + uuuur r r uuuur r r 7IEm8/01,-+B/C,&Q8j/ ( ) * KK p n OM u ∆   → = =   r uuuur r EmZE`W3VE<W3VETW3U3  `V<VTU3 45E'F-1,0 điểm3' ( ) ( )    *     2 3  f 2 ez z i i i i i i= + − = − + − = + VmQ&Z2 VmQZe GH#G